Water Quality Lookup / California / Napa County

EPA SDWIS · Napa County, California · 358 providers profiled

Napa County, CA Water Quality Report

Napa County is served by 358 major public water systems on file with the EPA.

Data current as of July 2026

🔍Straight from EPA

🧪Real Lab Results

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Results for Napa County, CA

358 water providers on file for this county, sorted by population served.

Quick answer: Napa County has 358 water providers profiled, sorted by population served.

Violations on file

Coliform (TCR)

Older/archived health-based violation

Found at 9 of 358 providers

Nitrate-Nitrite

Older/archived health-based violation

Found at 1 of 358 providers

Revised Total Coliform Rule

Older/archived health-based violation

Found at 1 of 358 providers

Surface Water Treatment Rule

Older/archived health-based violation

Found at 1 of 358 providers

Lead And Copper Rule Revisions

Currently open health violation

Found at 25 of 358 providers

Nitrate

Older/archived health-based violation

Found at 1 of 358 providers

Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.

Total Haloacetic Acids (HAA5)

Older/archived health-based violation

Found at 1 of 358 providers

Contaminants found

Metals

Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper

Lead Summary

Detected: 0.0755 mg/L (ppm)

Found at 106 providers

Copper Summary

Detected: 6.36 mg/L (ppm)

Found at 20 providers

Arsenic

Detected: 73 UG/L (ppb)

Found at 31 providers

Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.

Copper, Free

Detected: 1100 UG/L (ppb)

Found at 43 providers

Chromium, Hex

Detected: 3.48 UG/L (ppb)

Found at 38 providers

Lead

Detected: 31 UG/L (ppb)

Found at 12 providers

A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.

Vanadium, Total

Detected: 11 UG/L (ppb)

Found at 5 providers

Barium

Detected: 1000 UG/L (ppb)

Found at 14 providers

Iron

Detected: 4700 UG/L (ppb)

Found at 19 providers

Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.

Manganese

Detected: 4480 UG/L (ppb)

Found at 17 providers

Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.

Zinc

Detected: 414 UG/L (ppb)

Found at 5 providers

Aluminum

Detected: 1650 UG/L (ppb)

Found at 9 providers

Nickel

Detected: 15 UG/L (ppb)

Found at 4 providers

Thallium, Total

Detected: 1.2 UG/L (ppb)

5/5/2025

Selenium

Detected: 27 UG/L (ppb)

5/5/2025

Chromium

Detected: 1 UG/L (ppb)

Found at 2 providers

Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).

Disinfection Byproducts

Formed when chlorine used to disinfect water reacts with organic matter

Totalhaloaceticacids (HAA5)

Detected: 70 UG/L (ppb)

Found at 18 providers

TTHM

Detected: 82 UG/L (ppb)

Found at 23 providers

A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.

Chloroform

Detected: 69 UG/L (ppb)

Found at 20 providers

One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.

Bromoform

Detected: 14.51 UG/L (ppb)

Found at 7 providers

Bromodichloromethane

Detected: 20 UG/L (ppb)

Found at 20 providers

Dibromochloromethane

Detected: 9.1 UG/L (ppb)

Found at 20 providers

Inorganics

Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride

Nitrate

Detected: 4.5 MG/L (ppm)

Found at 61 providers

Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.

Fluoride

Detected: 0.66 MG/L (ppm)

Found at 20 providers

Often added deliberately for dental health; can also occur naturally.

Boron, Total

Detected: 750 UG/L (ppb)

Found at 6 providers

Chloride

Detected: 940 MG/L (ppm)

Found at 24 providers

Sulfate

Detected: 190 MG/L (ppm)

Found at 22 providers

Nitrate-Nitrite

Detected: 0.17 MG/L (ppm)

8/27/2025

Minerals

Everyday minerals that mainly affect taste and water hardness

Magnesium

Detected: 49.8 MG/L (ppm)

Found at 20 providers

Sodium

Detected: 149 MG/L (ppm)

Found at 20 providers

Calcium

Detected: 90 MG/L (ppm)

Found at 20 providers

Potassium

Detected: 8.5 MG/L (ppm)

Found at 4 providers

Properties

General water characteristics like pH, hardness, and cloudiness (turbidity)

Gross Alpha Particle Activity

Detected: 4.63 PCI/L

Found at 6 providers

Hardness, Total (ASCACO3)

Detected: 430 MG/L (ppm)

Found at 19 providers

pH

Detected: 8 PH

Found at 21 providers

A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.

pH, Field

Detected: 7.46 PH

Found at 3 providers

Langelier Index (pH(s))

Detected: 0.3 LANG

10/8/2025

Orthophosphate

Detected: 0.14 MG/L (ppm)

10/8/2025

PFAS & Emerging Contaminants

Human-made "forever chemicals" and other substances not yet fully regulated

PFHXA

Detected: 0.0032 µg/L (ppb)

6/4/2024

PFPEA

Detected: 0.0042 µg/L (ppb)

6/4/2024

PFOS

Detected: 0.0122 µg/L (ppb)

6/4/2024

One of two PFAS with an enforceable federal limit (4 ppt) since 2024.

PFOA

Detected: 0.0064 µg/L (ppb)

6/4/2024

One of two PFAS with an enforceable federal limit (4 ppt) since 2024.

Lithium

Detected: 54 µg/L (ppb)

7/12/2023

Occurs naturally in some groundwater. Not currently federally regulated in drinking water.

VOCs (Volatile Organic Compounds)

Industrial solvents and fuel-related chemicals that evaporate easily

1, 2, 3-Trichloropropane

Detected: 0.015 UG/L (ppb)

3/19/2025

Bromide

Detected: 0.018 MG/L (ppm)

4/17/2025

Calculated Parameters

Values worked out mathematically from other test results, not measured directly

Alkalinity, Bicarbonate

Detected: 340 MG/L (ppm)

Found at 23 providers

Other

Additional substances tested that don't fit neatly into the categories above

Dibromoaceticacid

Detected: 4.7 UG/L (ppb)

Found at 12 providers

Alkalinity, Total

Detected: 299 MG/L (ppm)

Found at 23 providers

Bromate

Detected: 4.4 UG/L (ppb)

Found at 2 providers

Aggressive Index

Detected: 12 AGGR

Found at 7 providers

TDS

Detected: 2200 MG/L (ppm)

Found at 24 providers

Turbidity

Detected: 200 NTU

Found at 24 providers

A measure of water cloudiness from suspended particles.

Conductivity (at 25°C)

Detected: 3200 UMHO/CM

Found at 23 providers

Radium-228

Detected: 2.19 PCI/L

Found at 6 providers

Combined Radium (-226 & -228)

Detected: 2.4 PCI/L

Found at 2 providers

A naturally occurring radioactive element found in some groundwater.

Dichloroaceticacid

Detected: 40.6 UG/L (ppb)

Found at 15 providers

Odor

Detected: 28 TON

Found at 15 providers

Color

Detected: 250 UNITS

Found at 14 providers

Trichloroaceticacid

Detected: 39 UG/L (ppb)

Found at 14 providers

Carbon, Total

Detected: 4.85 MG/L (ppm)

Found at 7 providers

Monobromoaceticacid

Detected: 1.9 UG/L (ppb)

Found at 2 providers

Monochloroaceticacid

Detected: 2.2 UG/L (ppb)

Found at 4 providers

Silica

Detected: 92 MG/L (ppm)

Found at 3 providers

Gross Beta Particle Activity

Detected: 5.25 PCI/L

8/28/2025

Chlorinedioxide

Detected: 1.5 MG/L (ppm)

7/9/2025

Temperature (CENTIGRADE)

Detected: 25 C

Found at 2 providers

Langelier Index (Source Temp.)

Detected: -0.26 LANG

10/8/2025

Metolachlor

Detected: 0.095 UG/L (ppb)

10/8/2025

Filtration considerations: General system types, not a specific product recommendation.

Contaminant	Whole-House Carbon	Under-Sink RO	Under-Sink Carbon
Total Trihalomethanes (TTHM)	Yes	Yes	Yes
Haloacetic Acids (HAA5)	Yes	Yes	Yes
Chloroform	Yes	Yes	Yes
Chlorine / Taste	Yes	Yes	Yes
Sediment / Turbidity	Yes	Yes	Yes
Trichloroethylene	Yes	Yes	Yes
Tetrachloroethylene	Yes	Yes	Yes
cis-1,2-Dichloroethylene	Yes	Yes	Yes
1,1-Dichloroethylene	Yes	Yes	Yes
Bromoform	Yes	Yes	Yes
Bromodichloromethane	Yes	Yes	Yes
Dibromochloromethane	Yes	Yes	Yes
1,1,2-Trichloroethane	Yes	Yes	Yes
Vinyl Chloride	Yes	Yes	Yes
Carbon Tetrachloride	Yes	Yes	Yes
Benzene	Yes	Yes	Yes
Toluene	Yes	Yes	Yes
Xylene	Yes	Yes	Yes
Totalhaloaceticacids (HAA5)	Yes	Yes	Yes
1, 2, 3-Trichloropropane	Yes	Yes	Yes
Bromide	Yes	Yes	Yes
Lead	Partial	Yes	Partial
Arsenic	Partial	Yes	Partial
Chromium-6 (Hexavalent)	Partial	Yes	Partial
Copper	Partial	Yes	Partial
Combined Uranium	Partial	Yes	Partial
PFOA	Partial	Yes*	Partial
PFOS	Partial	Yes*	Partial
Nitrate	Partial	Yes	Partial
Combined Radium	Partial	Yes	Partial
Dibromoaceticacid	Partial	Yes	Partial
Copper, Free	Partial	Yes	Partial
Fluoride	Partial	Yes	Partial
Chromium, Hex	Partial	Yes	Partial
Vanadium, Total	Partial	Yes	Partial
Barium	Partial	Yes	Partial
Alkalinity, Total	Partial	Yes	Partial
Boron, Total	Partial	Yes	Partial
Bromate	Partial	Yes	Partial
Aggressive Index	Partial	Yes	Partial
TDS	Partial	Yes	Partial
Chloride	Partial	Yes	Partial
Sulfate	Partial	Yes	Partial
Iron	Partial	Yes	Partial
Manganese	Partial	Yes	Partial
Zinc	Partial	Yes	Partial
Conductivity (at 25°C)	Partial	Yes	Partial
Combined Radium (-226 & -228)	Partial	Yes	Partial
Dichloroaceticacid	Partial	Yes	Partial
Odor	Partial	Yes	Partial
Aluminum	Partial	Yes	Partial
Color	Partial	Yes	Partial
Trichloroaceticacid	Partial	Yes	Partial
Carbon, Total	Partial	Yes	Partial
Monobromoaceticacid	Partial	Yes	Partial
Monochloroaceticacid	Partial	Yes	Partial
Nickel	Partial	Yes	Partial
Thallium, Total	Partial	Yes	Partial
Selenium	Partial	Yes	Partial
Silica	Partial	Yes	Partial
Gross Beta Particle Activity	Partial	Yes	Partial
PFHXA	Partial	Yes*	Partial
PFPEA	Partial	Yes*	Partial
Chlorinedioxide	Partial	Yes	Partial
Lithium	Partial	Yes*	Partial
Temperature (CENTIGRADE)	Partial	Yes	Partial
Langelier Index (Source Temp.)	Partial	Yes	Partial
Metolachlor	Partial	Yes	Partial
Chromium	Partial	Yes	Partial
Nitrate-Nitrite	Partial	Yes	Partial
Coliform Bacteria (indicator)	No	Yes	No
Gross Alpha Particle Activity	No	No	No
Magnesium	No	Partial	No
Sodium	No	Partial	No
Calcium	No	Partial	No
Alkalinity, Bicarbonate	No	No	No
Hardness, Total (ASCACO3)	No	No	No
pH	No	No	No
Potassium	No	Partial	No
pH, Field	No	No	No
Langelier Index (pH(s))	No	No	No
Orthophosphate	No	No	No

Browse by city

Individual water providers

NAPA, CITY OF No violations on file — pop. 84,804 — serves NAPA
AMERICAN CANYON, CITY OF No violations on file — pop. 21,437 — serves AMERICAN CANYON
PHELPS VINEYARDS No violations on file — pop. 19,412
CALISTOGA, CITY OF No violations on file — pop. 5,610 — serves CALISTOGA
ST. HELENA, CITY OF Older violation on record — pop. 5,386 — serves ST. HELENA
RANCHO MONTICELLO RESORT No violations on file — pop. 2,900
TOWN OF YOUNTVILLE No violations on file — pop. 2,787
PACIFIC UNION COLLEGE No violations on file — pop. 2,000
LAKE BERRYESSA MARINA RESORT - INACTIVE No violations on file — pop. 2,000
PACIFIC UNION COLLEGE No violations on file — pop. 1,958
HOWELL MOUNTAIN MUTUAL WATER COMPANY No violations on file — pop. 1,240
NAPA-BERRYESSA RESORT No violations on file — pop. 1,150

SPANISH FLAT RESORT No violations on file — pop. 1,150
SOUTH SHORE RESORT No violations on file — pop. 1,000
VETERANS HOME OF CALIFORNIA Open violation — pop. 1,000
CASTELLO DI AMOROSA Open violation — pop. 833
ADVENTIST HEALTH - ST. HELENA HOSPITAL No violations on file — pop. 817
BERRYESSA HIGHLANDS No violations on file — pop. 715
SPANISH FLAT CALIF WATER DIST No violations on file — pop. 700
DOMAINE CARNEROS No violations on file — pop. 652
NAPA PIPE REDEVELOPMENT PARTNERS Older violation on record — pop. 650
CSP-BOTHE-NAPA VALLEY STATE PARK No violations on file — pop. 565
CHIMNEY ROCK GOLF COURSE Older violation on record — pop. 500
BERRYESSA PARK HDQTRS No violations on file — pop. 500
MACEDONIAN PICNIC GROUND No violations on file — pop. 500
CIRCLE OAKS WATER DISTRICT No violations on file — pop. 500
RAYMOND VINEYARD & CELLAR Open violation — pop. 490
BERRYESSA ESTATES (LBRID) No violations on file — pop. 474
SUTTER HOME WINERY No violations on file — pop. 417
BASALT ROCK COMPANY No violations on file — pop. 400
NAPA VALLEY COUNTRY CLUB Open violation — pop. 400
BERINGER WINE WORLD No violations on file — pop. 360
HILLSIDE CHRISTIAN CENTER WATER SYSTEM No violations on file — pop. 311
BERINGER VINEYARDS No violations on file — pop. 300
MT GEORGE SCHOOL No violations on file — pop. 275
BERRYESSA PINES WATER SYSTEM Open violation — pop. 261
NAPA MOBIL MANOR No violations on file — pop. 255
PUEBLO TRAILER PARK - INACTIVE No violations on file — pop. 255
SILVERADO PINES MOBILE HOME No violations on file — pop. 255
VINTER S VILLAGE No violations on file — pop. 250
LAKE BERRYESSA PARK No violations on file — pop. 250
MEYERS WATER CO. No violations on file — pop. 250
HESS WINERY Open violation — pop. 250
BELLA UNION WINERY No violations on file — pop. 238
RUTHERFORD HILL MUTUAL WATER No violations on file — pop. 232
SPANISH FLAT WATER DISTRICT Open violation — pop. 230
CAPELL VALLEY ESTATES Open violation — pop. 208
ENCHANTED HILLS No violations on file — pop. 206
WINE COUNTRY, INC. No violations on file — pop. 200
HANSEN, GORDON TRAINING STABLE No violations on file — pop. 200
NAPA VALLEY STATE PARK No violations on file — pop. 200
MOSKOWITE CORNERS No violations on file — pop. 200
OAK LAKE PARK No violations on file — pop. 200
STERLING INTERNATIONAL WINERY No violations on file — pop. 200
SILVERADO PINES MOBILEHOME No violations on file — pop. 200
PUTAH CANYON CAMPGROUND Older violation on record — pop. 200
TUCKER ACRES MUTUAL WATER CO. No violations on file — pop. 200
BELL WINE CELLARS No violations on file — pop. 200 — serves NAPA
WELCOME GRANGE HALL Older violation on record — pop. 200
TPWC DBA THE PRISONER WINE COMPANY No violations on file — pop. 200
DOMAINE CHANDON Open violation — pop. 200
THE RANCH WINERY No violations on file — pop. 200
MT. GEORGE ESTATE No violations on file — pop. 190
SILVER OAK WINE CELLARS Open violation — pop. 188
CSP - BALE GRIST MILL STATE HISTORIC PAR No violations on file — pop. 185
SYAR INDUSTRIES No violations on file — pop. 180
HOWELL MOUNTAIN SCHOOL No violations on file — pop. 170
SCHRAMSBERG WINERY No violations on file — pop. 161
Chateau Potelle No violations on file — pop. 150
THE VINEYARD No violations on file — pop. 150
TURTLE ROCK WATER SUPPLY No violations on file — pop. 150
SILVER PONY SCHOOL No violations on file — pop. 150
STERLING VINEYARDS No violations on file — pop. 150
ROMBAUER VINEYARDS No violations on file — pop. 150
SKYLINE PARK No violations on file — pop. 150
NAPA-SOLANO GIRL SCOUTS No violations on file — pop. 150
NICKEL & NICKEL WINERY No violations on file — pop. 148
P O BOX 238 RUTHERFORD 94573 No violations on file — pop. 130
SYAR INDUSTRIES No violations on file — pop. 130
MILAT WINERY No violations on file — pop. 128
CARNEROS SCHOOL No violations on file — pop. 125
CHATEAU MONTELENA WINERY No violations on file — pop. 125
CHIMNEY ROCK WINERY No violations on file — pop. 122
LEWIS CELLARS No violations on file — pop. 119
ONE HOPE WINERY No violations on file — pop. 110 — serves NAPA
BALDACCI FAMILY VINEYARDS No violations on file — pop. 110 — serves NAPA
RUTHERFORD HILL WINERY Open violation — pop. 110
SAINTSBURY WINERY No violations on file — pop. 109 — serves NAPA
PLEASURE COVE RESORT No violations on file — pop. 106
LAIRD WINE STUDIO No violations on file — pop. 106
NVUSD: CARNEROS SCHOOL No violations on file — pop. 100
MTN MILL HOUSE No violations on file — pop. 100
WINE VALLEY INN No violations on file — pop. 100
ANDERSON VINEYARD No violations on file — pop. 100
ATLAS PEAK VINEYARDS No violations on file — pop. 100
USIBELLI LODGE No violations on file — pop. 100
BALE MILL No violations on file — pop. 100
BAR 49 RANCH No violations on file — pop. 100
VINEYARD KNOLLS GOLF COURSE No violations on file — pop. 100
SANTANA DHARMA CAMP No violations on file — pop. 100
ODD FELLOW PARK (chg. district) No violations on file — pop. 100
MILLIKEN CAMP No violations on file — pop. 100
SUZIES ON THE MOUNTAIN No violations on file — pop. 100
WILD HORSE VALLEY RANCH Older violation on record — pop. 100
TUCKER ACRES MUTUAL WATER CO. No violations on file — pop. 100
BEAULIEU VINEYARD No violations on file — pop. 100
STERLING VINEYARDS No violations on file — pop. 100
NAPA COUNTY SCHOOLS: POPE VALLEY No violations on file — pop. 100
NVUSD: STONEBRIDGE SCHOOL No violations on file — pop. 100
HOWELL MOUNTAIN SCHOOL Open violation — pop. 100
GENE NORRIS PLAZA No violations on file — pop. 100
DUFFY'S NAPA VALLEY REHAB No violations on file — pop. 100
MONT ST. JOHN CELLARS No violations on file — pop. 100
CLOS DU VAL WINE CO. No violations on file — pop. 100
RUDD WINES, INC., DBA RUDD No violations on file — pop. 100
OPUS ONE WINERY No violations on file — pop. 100
ROUND HILL WINERY No violations on file — pop. 100
SILVERADO VINEYARDS No violations on file — pop. 100
CAKEBREAD CELLAR Older violation on record — pop. 100
LOKOYA REDWOODS Older violation on record — pop. 100
NVUSD: WOODEN VALLEY SCHOOL No violations on file — pop. 100
NVUSD: CAPELL VALLEY SCHOOL No violations on file — pop. 100
CHATEAU BOSWELL No violations on file — pop. 100
NEWTON VINEYARD No violations on file — pop. 100
ST. CLEMENT VINEYARDS INC. No violations on file — pop. 100
AETNA SPRINGS GOLF COURSE No violations on file — pop. 100
MT. GEORGE ESTATES No violations on file — pop. 100
PIAZZA WINERY No violations on file — pop. 99
CAIRDEAN WINERY No violations on file — pop. 99
Z D WINES No violations on file — pop. 95
LINDA VISTA MUTUAL WATER CO No violations on file — pop. 90
CARDINALE ESTATE No violations on file — pop. 88
DAVIS ESTATES No violations on file — pop. 84
BERRYESSA PARK WATER CO No violations on file — pop. 80
ARTESA VINEYARDS & WINERY No violations on file — pop. 76
A-1 MARKET No violations on file — pop. 75
Manley s Resort No violations on file — pop. 75
MT ST HELENA HI-WAY SPRING No violations on file — pop. 75
COOMBS RANCH CAMPGROUND No violations on file — pop. 75
WRIGHTS CORNER No violations on file — pop. 75
St. Andrews Winery No violations on file — pop. 75
CATHIARD FAMILY ESTATE WINERY No violations on file — pop. 75
PINE RIDGE WINERY No violations on file — pop. 75
MARKLEY COVE RESORT No violations on file — pop. 75
WHITE SULPHUR SPRINGS RESORT No violations on file — pop. 75
B CELLARS WINERY No violations on file — pop. 74
WOOLLS RANCH WINERY No violations on file — pop. 73
HONIG WINERY No violations on file — pop. 70
NAPA RIVER RANCH Open violation — pop. 70
LA TIERRA HEIGHTS MUTUAL Open violation — pop. 67
RIVER RANCH FARM WORKER CENTER No violations on file — pop. 66
MONDAVI FARM WORKER CENTER No violations on file — pop. 66
CALISTOGA FARM WORKER CENTER No violations on file — pop. 65
CAL FIRE SONOMA-LAKE-NAPA UNIT HQ No violations on file — pop. 65
COSENTINO WINERY No violations on file — pop. 65
TITUS WINERY No violations on file — pop. 64
CONN CREEK WINERY No violations on file — pop. 64
HOMESTAKE MINING COMPANY-NAPA COUNTY No violations on file — pop. 60
CHRISTIAN BROS No violations on file — pop. 60
CT LIFE INSURANCE CO No violations on file — pop. 60
NEW EL FARO RESTAURANT No violations on file — pop. 60
WINE COUNTRY INN Open violation — pop. 60
REVERIE WINERY No violations on file — pop. 60
DAKOTA SHY WINERY No violations on file — pop. 58
NAPA COUNTY ANIMAL SHELTER No violations on file — pop. 55
LAKE BERRYESSA BOY SCOUT CAMP No violations on file — pop. 55
LAIRD FAMILY ESTATE Open violation — pop. 55
FREEMARK ABBEY WINERY No violations on file — pop. 55
NICHELINI WINERY No violations on file — pop. 50
FRENCH WINE EMBASSY, INC No violations on file — pop. 50
CHEVRON SERVICE No violations on file — pop. 50
SUNRISE MONTESSORI SCHOOL No violations on file — pop. 50
WOODEN VALLEY SCHOOL No violations on file — pop. 50
SCHRAMSBERG WINERY No violations on file — pop. 50
VINELAND MOBILEHOME PARK No violations on file — pop. 50
HEITZ WINE CELLAR No violations on file — pop. 50
PHELPS, JOSEPH WINERY No violations on file — pop. 50
RUTHERFORD HILL No violations on file — pop. 50
CHRISTIAN BROTHERS No violations on file — pop. 50
LOKOYA MT LODGE No violations on file — pop. 50
SODA CANYON STORE No violations on file — pop. 50
NAPA VALLEY MARINA No violations on file — pop. 50
ETUDE WINES No violations on file — pop. 50
FRANK FAMILY VINEYARDS Older violation on record — pop. 50
MUMM OF NAPA VALLEY No violations on file — pop. 50
RANCHO LA JOTA No violations on file — pop. 50
CHAPPELLET WINERY No violations on file — pop. 49
NAPA VALLEY RESERVE WATER SYSTEM No violations on file — pop. 49
MATERRA WINERY No violations on file — pop. 49
ROBERT KEENAN WINERY No violations on file — pop. 48
DBA SILVER ROSE CELLARS No violations on file — pop. 45
SHARON S WATER SYSTEM No violations on file — pop. 45
VINIFERH DEVELOPMENT LABOR CAM No violations on file — pop. 45
GROTH VINEYARDS & WINERY No violations on file — pop. 45
BLACK STALLION WINERY No violations on file — pop. 45
V. SATTUI WINERY Open violation — pop. 45
MILTON ROAD WATER COMPANY Open violation — pop. 44
TWOMEY CELLARS No violations on file — pop. 43
WHITEHALL LANE WINERY No violations on file — pop. 43
TRINCHERO WINERY No violations on file — pop. 42
EHLERS ESTATE No violations on file — pop. 42
CAYMUS VINEYARDS No violations on file — pop. 42
FANTESCA WINERY No violations on file — pop. 41
SOUVERAIN CELLARS, INC No violations on file — pop. 40
CALISTOGA COTTAGES No violations on file — pop. 40
PINE KNOLL MUTUAL WATER CO No violations on file — pop. 40
Heritage School No violations on file — pop. 40
GAMBLE FAMILY VINEYARDS WINERY No violations on file — pop. 40
ST. SUPERY WINERY No violations on file — pop. 40
STAGS LEAP WINE CELLARS No violations on file — pop. 40
HUDSON VINEYARDS WINERY WATER SYSTEM No violations on file — pop. 40
BEHRENS FAMILY WINERY No violations on file — pop. 39
WHEELER FARMS WINERY No violations on file — pop. 39
FOLEY JOHNSON WINERY No violations on file — pop. 37
BOUCHAINE VINEYARDS No violations on file — pop. 37
U.S. BUREAU OF RECLAMATION-LK. BERRYESSA No violations on file — pop. 37
DI ROSA ART PRESERVE No violations on file — pop. 37
MAXVILLE LAKE WINERY No violations on file — pop. 36
OVID NAPA VALLEY No violations on file — pop. 35 — serves ST. HELENA
LINDA FALLS TERRACE MUTUAL No violations on file — pop. 35
QUINTESSA WINERY WATER SYSTEM No violations on file — pop. 33 — serves ST. HELENA
JOSEPH CELLARS WINERY No violations on file — pop. 32
STAGS LEAP WINERY No violations on file — pop. 32
CARNEROS INN No violations on file — pop. 30
NAPA VALLEY FARM AND RANCH COM No violations on file — pop. 30
CYRIL E SAVIEZ LABOR CAMP No violations on file — pop. 30
BENTLEY HOMES No violations on file — pop. 30
GLASS MT TRAILER PARK No violations on file — pop. 30
BREEZY RESORT No violations on file — pop. 30
WISPERING OAKS APTS. No violations on file — pop. 30
STATE HIGHWAY MAINT YARD No violations on file — pop. 30
PACIFIC GAS AND ELECTRIC CO No violations on file — pop. 30
POPE VALLEY SCHOOL No violations on file — pop. 30
MONTICELLO SCHOOL No violations on file — pop. 30
CAPELL VALLEY SCHOOL No violations on file — pop. 30
FRANK L WOOD No violations on file — pop. 30
. No violations on file — pop. 30
CAMP KILOWANA No violations on file — pop. 30
FAR NIENTE WINERY No violations on file — pop. 30
LOKOYA WINERY No violations on file — pop. 30
OUTPOST WINES No violations on file — pop. 30
ESPINOZA WATER SYSTEM Older violation on record — pop. 30
COUNTRY INN, THE No violations on file — pop. 29
SOMERSTON WINERY Open violation — pop. 28
R RANCH AT THE LAKE Open violation — pop. 28
PESTONI FAMILY ESTATE WINERY No violations on file — pop. 28
DEL DOTTO WINERY No violations on file — pop. 27
PEJU PROVINCE Open violation — pop. 27
JARVIS VINEYARD No violations on file — pop. 27
LMR MAIN STREET PARTNERS LLC No violations on file — pop. 26
CASTLE TROVE, INC. Older violation on record — pop. 25
MERRYVALE VINEYARDS No violations on file — pop. 25
CULINARY INSTITUTE OF AMERICA No violations on file — pop. 25
PELISSA AND HALE No violations on file — pop. 25
ARCO SERVICE No violations on file — pop. 25
VICTOR GRUSDIV No violations on file — pop. 25
VALLEY MARKET No violations on file — pop. 25
REXFORD MOBILE HOME ESTATES No violations on file — pop. 25
JERRY'S MARKET No violations on file — pop. 25
MT LA SALLE VINEYARDS No violations on file — pop. 25
STAGS LEAP WINERY No violations on file — pop. 25
ROBERT MONDAVI LABOR CAMP No violations on file — pop. 25
NAPA COUNTY MAINTENANCE YARD No violations on file — pop. 25
RAINBOW RANCH No violations on file — pop. 25
STRACK W.D. WATER No violations on file — pop. 25
LAS POSADAS 4-H CAMP No violations on file — pop. 25
11:11 WINERY No violations on file — pop. 25
BURGESS CELLARS No violations on file — pop. 25
STAGLIN FAMILY VINEYARD No violations on file — pop. 25
HUNNICUTT WINERY No violations on file — pop. 25
UPPER VALLEY DISPOSAL SERVICE No violations on file — pop. 25
CUVAISON CARNEROS No violations on file — pop. 25
MARKHAM VINEYARDS No violations on file — pop. 25
PCSH, LLC No violations on file — pop. 25
REALM ESTATE No violations on file — pop. 25
DOMINUS ESTATE WINERY No violations on file — pop. 25
DUCKHORN VINEYARDS No violations on file — pop. 25
O'SHAUGHNESSY WINERY No violations on file — pop. 25
HAGAFEN CELLARS No violations on file — pop. 25
ENVY WINES No violations on file — pop. 25
KATHRYN HALL WINERY No violations on file — pop. 25
LARKMEAD VINEYARDS No violations on file — pop. 25
FROGS LEAP WINERY No violations on file — pop. 25
SILENUS VINTNERS No violations on file — pop. 25
TURTLE ROCK No violations on file — pop. 25
KENZO WINERY No violations on file — pop. 25
ITALICS WINERY No violations on file — pop. 25
DARIOUSH WINERY Open violation — pop. 25
ANTINORI CALIFORNIA No violations on file — pop. 25 — serves NAPA
SHADYBROOK ESTATES WINERY No violations on file — pop. 25
ASHES & DIAMONDS WINERY No violations on file — pop. 25
NINE SUNS WINERY No violations on file — pop. 25 — serves ST. HELENA
MENDING WALL WINERY No violations on file — pop. 25
CAMP BERRYESSA No violations on file — pop. 25
VAILIMA ESTATES MUTUAL WATER No violations on file — pop. 25
GRGICH HILLS No violations on file — pop. 25
OAKVILLE GROCERY CO. Open violation — pop. 25
MAYACAMAS VINEYARDS No violations on file — pop. 25
ST. HELENA PURLIEU LLC No violations on file — pop. 25
GOLDEN HAVEN MOTEL No violations on file — pop. 25
CLOS PEGASE WINERY Open violation — pop. 25
ALPHA OMEGA WINERY No violations on file — pop. 25
SEQUOIA GROVE VINEYARDS Open violation — pop. 25
OAKVILLE GRADE WINERY No violations on file — pop. 25
WILLIAM HILL WINERY No violations on file — pop. 25
GOOSECROSS CELLARS No violations on file — pop. 25
BENNETT LANE WINERY No violations on file — pop. 25 — serves CALISTOGA
ODETTE ESTATE WATER SYSTEM Older violation on record — pop. 25
MINER FAMILY WINERY No violations on file — pop. 25
LIANA ESTATE No violations on file — pop. 25
THE BARREL CHAI No violations on file — pop. 25
BIALE WINERY No violations on file — pop. 25 — serves NAPA
FAIRWINDS ESTATE WINERY No violations on file — pop. 25
CALISTOGA RANCH No violations on file — pop. 25
VINEYARD 29 No violations on file — pop. 24
ROUND POND ESTATE WINERY LLC No violations on file — pop. 24
PALMAZ VINEYARDS No violations on file — pop. 24
JACKSON FAMILY INVESTMENTS WATER SYSTEM No violations on file — pop. 24
HOWELL MT RD HI-WAY SPRING No violations on file — pop. 20
EMMOLO NURSERY No violations on file — pop. 20
PHILLIP DOUB No violations on file — pop. 20
NAPA CO MAINTENANCE YARD No violations on file — pop. 20
CALIFORNIA STATE DIVISION OF F No violations on file — pop. 20
DONALD E CHAIX No violations on file — pop. 20
GALLERON BROTHERS No violations on file — pop. 20
SPRING MT RD HI-WAY SPRING No violations on file — pop. 20
DRAPER AND CULBERTSON No violations on file — pop. 20
SAME No violations on file — pop. 20
PICKETT ROAD WINE COMPANY No violations on file — pop. 20
DANA ESTATES No violations on file — pop. 20
WOODLOT ASSOC.,INC. No violations on file — pop. 20
MARCIANO WINERY No violations on file — pop. 20
VINEYARD 7 & 8 No violations on file — pop. 20
CADE WINERY No violations on file — pop. 20
L AND M MARTINI No violations on file — pop. 18
WOODLAND RIDGE MUTUAL WATER CO Older violation on record — pop. 18
NAPA STATE HOSPITAL-CAMP COOMBS No violations on file — pop. 15
STONEGATE WINERY No violations on file — pop. 15
SILVER PONY SCHOOL No violations on file — pop. 15
CALPLANS FARMS No violations on file — pop. 12
POPE VALLEY WINERY No violations on file — pop. 10
TREFTHEN RANCH LABOR CAMP No violations on file — pop. 10
PACIFIC GAS AND ELECTRIC CO No violations on file — pop. 10
YORK CREEK VINEYARDS No violations on file — pop. 10
CHATEAU CHEVALIER No violations on file — pop. 10
D E BATTUELLO No violations on file — pop. 10
MAPES HEIGHTS MUTUAL WATER CO No violations on file — pop. 10
MUCHO DINERO AQUA CIA WATER No violations on file — pop. 10
THIRD AVENUE GROCERY No violations on file — pop. 8
GERALD MCCLAINE No violations on file — pop. 7
CARNEROS CREEK WINERY No violations on file — pop. 6
CHAPELLET WINERY No violations on file — pop. 5
VINE VILLAGE No violations on file — pop. 3
SHEVELAND APARTMENTS No violations on file — pop. 1
NAPA VALLEY VINEYARD CO No violations on file — pop. 1
HANNS KORNELL WINERY No violations on file — pop. 1
LAKESIDE MARKET No violations on file — pop. 0
RANCHO MONTICELLO RESORT No violations on file — pop. 0

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