Water Quality Lookup / California / Tuolumne County

EPA SDWIS · Tuolumne County, California · 274 providers profiled

Tuolumne County, CA Water Quality Report

Tuolumne County is served by 274 major public water systems on file with the EPA.

Data current as of July 2026

🔍Straight from EPA

🧪Real Lab Results

📅Updated Quarterly

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Results for Tuolumne County, CA

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

Quick answer: Tuolumne County has 274 water providers profiled, sorted by population served.

Violations on file

Coliform (TCR)

Older/archived health-based violation

Found at 4 of 274 providers

Selenium

Older/archived health-based violation

Found at 1 of 274 providers

Nitrate

Older/archived health-based violation

Found at 3 of 274 providers

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

Surface Water Treatment Rule

Older/archived health-based violation

Found at 2 of 274 providers

Lead And Copper Rule Revisions

Currently open health violation

Found at 12 of 274 providers

Arsenic

Older/archived health-based violation

Found at 1 of 274 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.

Total Haloacetic Acids (HAA5)

Older/archived health-based violation

Found at 2 of 274 providers

Revised Total Coliform Rule

Older/archived health-based violation

Found at 1 of 274 providers

Contaminants found

Metals

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

Lead Summary

Detected: 0.0126 mg/L (ppm)

Found at 78 providers

Copper Summary

Detected: 2.1 mg/L (ppm)

Found at 8 providers

Copper, Free

Detected: 1700 UG/L (ppb)

Found at 19 providers

Manganese

Detected: 500 UG/L (ppb)

Found at 28 providers

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

Zinc

Detected: 3600 UG/L (ppb)

Found at 8 providers

Combined Uranium

Detected: 53.7 PCI/L

Found at 5 providers

A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.

Iron

Detected: 21400 UG/L (ppb)

Found at 22 providers

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

Arsenic

Detected: 10 UG/L (ppb)

Found at 5 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.

Lead

Detected: 20 UG/L (ppb)

Found at 7 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.

Chromium, Hex

Detected: 2.2 UG/L (ppb)

Found at 14 providers

Vanadium, Total

Detected: 19 UG/L (ppb)

Found at 4 providers

Barium

Detected: 380 UG/L (ppb)

Found at 6 providers

Aluminum

Detected: 530 UG/L (ppb)

Found at 8 providers

Chromium

Detected: 64 UG/L (ppb)

Found at 5 providers

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

Antimony, Total

Detected: 1.04 UG/L (ppb)

4/2/2025

Nickel

Detected: 38 UG/L (ppb)

5/16/2025

Selenium

Detected: 3.4 UG/L (ppb)

5/16/2025

Disinfection Byproducts

Formed when chlorine used to disinfect water reacts with organic matter

Totalhaloaceticacids (HAA5)

Detected: 65.6 UG/L (ppb)

Found at 22 providers

TTHM

Detected: 83.2 UG/L (ppb)

Found at 25 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: 81.8 UG/L (ppb)

Found at 26 providers

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

Bromodichloromethane

Detected: 3.6 UG/L (ppb)

Found at 23 providers

Dibromochloromethane

Detected: 3.4 UG/L (ppb)

Found at 4 providers

Bromoform

Detected: 1.2 UG/L (ppb)

Found at 2 providers

Inorganics

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

Sulfate

Detected: 34 MG/L (ppm)

Found at 19 providers

Nitrate

Detected: 6.6 MG/L (ppm)

Found at 31 providers

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

Chloride

Detected: 170 MG/L (ppm)

Found at 20 providers

Fluoride

Detected: 0.304 MG/L (ppm)

Found at 8 providers

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

Nitrate-Nitrite

Detected: 3.6 MG/L (ppm)

Found at 3 providers

Nitrite

Detected: 0.61 MG/L (ppm)

6/9/2025

Minerals

Everyday minerals that mainly affect taste and water hardness

Magnesium

Detected: 74 MG/L (ppm)

Found at 24 providers

Sodium

Detected: 37 MG/L (ppm)

Found at 24 providers

Calcium

Detected: 180 MG/L (ppm)

Found at 24 providers

Potassium

Detected: 4 MG/L (ppm)

Found at 14 providers

Properties

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

Hardness, Total (ASCACO3)

Detected: 760 MG/L (ppm)

Found at 23 providers

Gross Alpha Particle Activity

Detected: 20 PCI/L

Found at 9 providers

pH

Detected: 7.9 PH

Found at 17 providers

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

Langelier Index (pH(s))

Detected: -0.03 LANG

Found at 10 providers

pH, Field

Detected: 7.57 PH

Found at 7 providers

Orthophosphate

Detected: 1.6 MG/L (ppm)

10/20/2025

Phosphate, Total

Detected: 1700 UG/L (ppb)

7/30/2025

PFAS & Emerging Contaminants

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

PFPEA

Detected: 0.0048 µg/L (ppb)

12/5/2023

PFBS

Detected: 0.003 µg/L (ppb)

12/5/2023

PFHXA

Detected: 0.0038 µg/L (ppb)

12/5/2023

Lithium

Detected: 12.5 µg/L (ppb)

6/3/2024

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

PFOS

Detected: 0.0049 µg/L (ppb)

12/11/2024

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

PFBA

Detected: 0.0072 µg/L (ppb)

12/11/2024

VOCs (Volatile Organic Compounds)

Industrial solvents and fuel-related chemicals that evaporate easily

Dichloromethane

Detected: 0.6 UG/L (ppb)

8/13/2025

Petroleum Compounds

Substances associated with fuel or petroleum contamination

Toluene

Detected: 122 UG/L (ppb)

3/19/2025

Calculated Parameters

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

Alkalinity, Bicarbonate

Detected: 1049 MG/L (ppm)

Found at 26 providers

Alkalinity, Carbonate

Detected: 12 MG/L (ppm)

Found at 2 providers

Other

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

Dichloroaceticacid

Detected: 34.3 UG/L (ppb)

Found at 24 providers

Trichloroaceticacid

Detected: 31.3 UG/L (ppb)

Found at 23 providers

Alkalinity, Total

Detected: 860 MG/L (ppm)

Found at 26 providers

TDS

Detected: 1000 MG/L (ppm)

Found at 25 providers

Turbidity

Detected: 9.8 NTU

Found at 21 providers

A measure of water cloudiness from suspended particles.

Conductivity (at 25°C)

Detected: 1400 UMHO/CM

Found at 25 providers

Dibromoaceticacid

Detected: 2 UG/L (ppb)

Found at 4 providers

Monochloroaceticacid

Detected: 5.9 UG/L (ppb)

Found at 17 providers

Carbon, Total

Detected: 2.8 MG/L (ppm)

Found at 11 providers

Odor

Detected: 110 TON

Found at 10 providers

Aggressive Index

Detected: 11.8 AGGR

Found at 13 providers

Color

Detected: 35 UNITS

Found at 15 providers

Perfluorobutanesulfonicacid (PFBS)

Detected: 6.7 NG/L (ppt)

Found at 3 providers

Perfluorohexanesulfonicacid (PFHxS)

Detected: 13 NG/L (ppt)

Found at 5 providers

Perfluoroctanesulfonicacid (PFOS)

Detected: 28 NG/L (ppt)

Found at 5 providers

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

Perfluoroctanoicacid (PFOA)

Detected: 20 NG/L (ppt)

Found at 3 providers

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

Perfluorohexanoicacid (PFHXA)

Detected: 7.8 NG/L (ppt)

Found at 3 providers

Perfluorobutanoicacid (PFBA)

Detected: 3.6 NG/L (ppt)

Found at 2 providers

Perfluoropentanoicacid (PFPEA)

Detected: 9.2 NG/L (ppt)

Found at 3 providers

Adsorbableorganicfluorine

Detected: 5800 NG/L (ppt)

Found at 3 providers

Radium-228

Detected: 1.31 PCI/L

Found at 4 providers

Totalradiumforntncper§64442(B) (3)

Detected: 2.02 PCI/L

9/4/2025

Combined Radium (-226 & -228)

Detected: 2.36 PCI/L

Found at 3 providers

A naturally occurring radioactive element found in some groundwater.

Perfluoroheptanoicacid (PFHPA)

Detected: 4.2 NG/L (ppt)

4/15/2025

Foamingagents (SURFACTANTS)

Detected: 0.16 MG/L (ppm)

Found at 5 providers

Atrazine

Detected: 0.1 UG/L (ppb)

6/9/2025

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
Dichloromethane	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
Dichloroaceticacid	Partial	Yes	Partial
Trichloroaceticacid	Partial	Yes	Partial
Copper, Free	Partial	Yes	Partial
Alkalinity, Total	Partial	Yes	Partial
TDS	Partial	Yes	Partial
Sulfate	Partial	Yes	Partial
Manganese	Partial	Yes	Partial
Zinc	Partial	Yes	Partial
Conductivity (at 25°C)	Partial	Yes	Partial
Dibromoaceticacid	Partial	Yes	Partial
Monochloroaceticacid	Partial	Yes	Partial
Carbon, Total	Partial	Yes	Partial
Combined Uranium	Partial	Yes	Partial
Iron	Partial	Yes	Partial
Chloride	Partial	Yes	Partial
Fluoride	Partial	Yes	Partial
Nitrate-Nitrite	Partial	Yes	Partial
Odor	Partial	Yes	Partial
Chromium, Hex	Partial	Yes	Partial
Aggressive Index	Partial	Yes	Partial
Vanadium, Total	Partial	Yes	Partial
Barium	Partial	Yes	Partial
Color	Partial	Yes	Partial
Aluminum	Partial	Yes	Partial
Perfluorobutanesulfonicacid (PFBS)	Partial	Yes	Partial
Perfluorohexanesulfonicacid (PFHxS)	Partial	Yes	Partial
Perfluoroctanesulfonicacid (PFOS)	Partial	Yes	Partial
Perfluoroctanoicacid (PFOA)	Partial	Yes	Partial
Perfluorohexanoicacid (PFHXA)	Partial	Yes	Partial
Perfluorobutanoicacid (PFBA)	Partial	Yes	Partial
Perfluoropentanoicacid (PFPEA)	Partial	Yes	Partial
Adsorbableorganicfluorine	Partial	Yes	Partial
Chromium	Partial	Yes	Partial
Totalradiumforntncper§64442(B) (3)	Partial	Yes	Partial
Combined Radium (-226 & -228)	Partial	Yes	Partial
PFPEA	Partial	Yes*	Partial
PFBS	Partial	Yes*	Partial
PFHXA	Partial	Yes*	Partial
Lithium	Partial	Yes*	Partial
Perfluoroheptanoicacid (PFHPA)	Partial	Yes	Partial
Foamingagents (SURFACTANTS)	Partial	Yes	Partial
PFBA	Partial	Yes*	Partial
Antimony, Total	Partial	Yes	Partial
Nitrite	Partial	Yes	Partial
Atrazine	Partial	Yes	Partial
Nickel	Partial	Yes	Partial
Selenium	Partial	Yes	Partial
Coliform Bacteria (indicator)	No	Yes	No
Magnesium	No	Partial	No
Sodium	No	Partial	No
Hardness, Total (ASCACO3)	No	No	No
Calcium	No	Partial	No
Alkalinity, Bicarbonate	No	No	No
Gross Alpha Particle Activity	No	No	No
Potassium	No	Partial	No
pH	No	No	No
Langelier Index (pH(s))	No	No	No
pH, Field	No	No	No
Alkalinity, Carbonate	No	No	No
Orthophosphate	No	No	No
Phosphate, Total	No	No	No

Browse by city

Individual water providers

TUD - UPPER BASIN WATER SYSTEM No violations on file — pop. 13,280
TUD - SONORA/JAMESTOWN WATER SYSTEM No violations on file — pop. 11,054
TUD - COLUMBIA WATER SYSTEM No violations on file — pop. 5,463
TUD - CRYSTAL FALLS WATER SYSTEM No violations on file — pop. 5,393
PEPPERY BAR AND GRILL, THE No violations on file — pop. 4,500
CDCR - SIERRA CONSERVATION CENTER No violations on file — pop. 3,571
GROVELAND COMMUNITY SERV DIST Open violation — pop. 3,400
LAKE DON PEDRO CSD Open violation — pop. 3,240
YOSEMITE NPS-TUOLUMNE MEADOWS No violations on file — pop. 2,500
TWAIN HARTE COMMUNITY SERVICES DISTRICT No violations on file — pop. 2,378
MI WUK VILLAGE MUT WTR CO No violations on file — pop. 2,163
TUD - CEDAR RIDGE WATER SYSTEM No violations on file — pop. 1,879

COLD SPRINGS WATER CO No violations on file — pop. 1,771
TUD - PONDEROSA No violations on file — pop. 1,767
TUD - TUOLUMNE WATER SYSTEM No violations on file — pop. 1,761 — serves SONORA
SIERRA CONSERVATION CENTER No violations on file — pop. 1,500
SIERRA CONSERVATION CENTER No violations on file — pop. 1,500
PINECREST PERMITTEES ASSN Open violation — pop. 1,298
DEL ORO WATER COMPANY - STRAWBERRY DIV. No violations on file — pop. 1,295
PHOENIX LAKE ESTATES CC MWC No violations on file — pop. 1,168
SONORA WATER RESOURCES, INC No violations on file — pop. 1,154
SONORA MEADOWS MUTUAL WTR CO Open violation — pop. 1,123
DON PEDRO REC AG:FLEM.MEADOWS No violations on file — pop. 1,041
USBR-TUTTLETOWN REC AREA No violations on file — pop. 1,000
TUD-APPLE VALLEY ESTATES No violations on file — pop. 826
TUD - MONO VILLAGE WATER SYSTEM No violations on file — pop. 640
USFS CLARK FORK CAMPD No violations on file — pop. 612
TUD - MONTE GRANDE WATER SYSTEM Older violation on record — pop. 548
TUD-CUESTA CENTER-LAMBERT LAKES No violations on file — pop. 533
TUD - BIG HILL WATER SYSTEM Older violation on record — pop. 531
MONO VILLAGE WATER DISTRICT No violations on file — pop. 525
JENNESS PARK CHRISTIAN CAMP No violations on file — pop. 507
CAMP TAWONGA No violations on file — pop. 505
WESTSIDE & CHERRY VALLEY RAILW No violations on file — pop. 500
CAMP MATHER No violations on file — pop. 500
PONDEROSA HILLS WATER COMPANY No violations on file — pop. 497
BELLEVIEW OAKS MUTUAL WATER CO No violations on file — pop. 468
MI WUK HEIGHTS MWC No violations on file — pop. 445
USFS BEARDSLEY PICNIC GROUND No violations on file — pop. 432
SUMMERVILLE UNION HIGH SCHOOL No violations on file — pop. 428
SLIDE INN SNOWBOWL WATER CO No violations on file — pop. 417
YOSEMITE LAKES CAMPGROUND No violations on file — pop. 413
SIERRA PARK WATER COMPANY INC. No violations on file — pop. 400
BERKELEY TUOLUMNE CAMP No violations on file — pop. 380
USFS BAKER/DEADMAN CGD No violations on file — pop. 366
SIERRA VILLAGE MUTUAL WATER CO No violations on file — pop. 361
USFS PINECREST REC AREA No violations on file — pop. 361
A.C. STILL No violations on file — pop. 350
LEISURE PINES MUTUAL WATER CO Open violation — pop. 340
DODGE RIDGE SKI RESORT No violations on file — pop. 328
CASCADE ESTATES No violations on file — pop. 316
LITTLE SPRINGS MUTUAL WATER CO No violations on file — pop. 308
HEAVENLY HILLS CHRISTIAN CAMP No violations on file — pop. 304
COLUMBIA ELEMENTARY SCHOOL No violations on file — pop. 300
SUMMERVILLE UNION HIGH SCHOOL No violations on file — pop. 300
YOSEMITE NPS-WHITE WOLF No violations on file — pop. 300
USFS SOURGRASS CAMPGD No violations on file — pop. 300
DON PEDRO REC AG:BLUE OAKS No violations on file — pop. 296
SIERRA OUTDOOR SCHOOL No violations on file — pop. 289
BLUEBELL VALLEY MWC No violations on file — pop. 282
PEPPERMINT CREEK MHP Older violation on record — pop. 280
TUD-EAST SONORA WATER SYSTEM No violations on file — pop. 269
RAWHIDE MUTUAL WATER COMPANY No violations on file — pop. 269
CHRISTIAN BERETS CONF. CENTER No violations on file — pop. 268
DEAN TURNER No violations on file — pop. 250
SAND FLAT CAMPGROUND No violations on file — pop. 240
SONORA ESTATES MOBILE HOME PARK Older violation on record — pop. 235
FOOTHILL HORIZONS No violations on file — pop. 230
SAN JOSE FAMILY CAMP No violations on file — pop. 230
USFS FRASER FLAT CAMPGD No violations on file — pop. 228
UNDER CANVAS-YOSEMITE No violations on file — pop. 226
TAMARRON MOBILE HOME PARK No violations on file — pop. 225
VOLPONI ACRES MUTUAL WATER CO Older violation on record — pop. 224
SUGAR PINE RV RESORT No violations on file — pop. 219
OLD OAK RANCH No violations on file — pop. 217
RANCHO POQUITOS MWC No violations on file — pop. 211
WATERFALL LODGE IMPROVEMENT CO No violations on file — pop. 210
GOLDEN SIERRA ESTATES_FKA MOTHER LODE No violations on file — pop. 210
ATLAS BUSINESS PARK No violations on file — pop. 206
TWAIN HARTE VALLEY MWC Open violation — pop. 202
RUSH CREEK LODGE WATER SYSTEM No violations on file — pop. 200
ALPINE ACRES MUTUAL WATER CO Open violation — pop. 195
CAMP JACK HAZARD No violations on file — pop. 190
YOSEMITE PINES RV MINI MART No violations on file — pop. 180
MARBLE QUARRY RESORT No violations on file — pop. 176
TUOLUMNE REGIONAL WATER DIST. No violations on file — pop. 175 — serves LAKEWOOD
SIERRA WALDORF SCHOOL No violations on file — pop. 175
USFS EUREKA VALLEY CAMPGD No violations on file — pop. 168
WM. & FRANCES BREWER No violations on file — pop. 157
TUD - PHOENIX LAKE PARK No violations on file — pop. 157
MEADOWBROOK PARK IMP ASSOC No violations on file — pop. 154
MULLER MUTUAL WATER COMPANY No violations on file — pop. 154
YOSEMITE NPS-GLEN AULIN No violations on file — pop. 150
CAL FIRE BASELINE CONSERVATION CAMP Open violation — pop. 150
LAKE TULLOCH CAMPGRD & MARINA No violations on file — pop. 138
MONO VISTA WATER COMPANY No violations on file — pop. 133
SIERRA PACIFIC INDUSTRIES No violations on file — pop. 133
EVERGREEN LODGE No violations on file — pop. 130
SIERRA TWAIN HARTE MHP No violations on file — pop. 129
CALIFORNIA ODD FELLOW-REBEKAH No violations on file — pop. 126
FIREFALL RANCH WATER SYSTEM Open violation — pop. 126
RAY PERRY No violations on file — pop. 120
A.C. STILL No violations on file — pop. 119
49ER TRAILER RANCH No violations on file — pop. 115
CARLON CAMPGROUND No violations on file — pop. 109
USFS UTICA UNION CAMPGROUND No violations on file — pop. 108
YOSEMITE HIGHLANDS WATER CO No violations on file — pop. 105
MONO VISTA RANCH MHP No violations on file — pop. 105
COW CREEK TRACT DIV 3 No violations on file — pop. 102
THE OAKS No violations on file — pop. 100
USFS DARDANELLE CAMP BRIGHTMN No violations on file — pop. 100
KENNEDY MEADOWS RESORT No violations on file — pop. 100
USFS HULL CREEK CAMPGD No violations on file — pop. 100
USBR-ADMIN CENTER No violations on file — pop. 100
LONG BARN PROPERTY OWNERS No violations on file — pop. 97
BELLEVIEW ELEMENTARY SCHOOL No violations on file — pop. 96
USFS BEARDSLEY CAMPGROUND No violations on file — pop. 96
TUD-PEACEFUL PINES WATER SYSTEM No violations on file — pop. 92
LELAND CREEK-WATER SYSTEM No violations on file — pop. 91
SNO BOWL WATER CO No violations on file — pop. 91
SIERRA VILLAGE No violations on file — pop. 91
HISTORIC PRIEST STATION, LLC No violations on file — pop. 90
COLUMBIA MOBILE HOME PARK No violations on file — pop. 89
DEPT OF CORRECTIONS No violations on file — pop. 85
YOSEMITE VISTA ESTATES No violations on file — pop. 85
USFS BOULDER FLAT No violations on file — pop. 80
LELAND CREEK IMPROVEMENT ASSOC No violations on file — pop. 79
USFS SWEETWATER CAMPGROUND No violations on file — pop. 78
RAMBLING HILLS ESTATES No violations on file — pop. 78
GOLD RUSH MOBILE HOME PARK No violations on file — pop. 67
USFS DRY MEADOWS STATION No violations on file — pop. 65
FIBREBOARD-KEYSTONE DIVISION No violations on file — pop. 65
PHOENIX LAKE GOLF CLUB No violations on file — pop. 64
LAZY Z MOBILE PARK No violations on file — pop. 63
TUD-WARDS FERRY RANCHES No violations on file — pop. 62
TERRACED MOBILE HOME PARK Older violation on record — pop. 60
BUMBLEBEE TRACT IMP ASSOC No violations on file — pop. 60
SONORA EAST CENTER No violations on file — pop. 60
GUS S STEAKHOUSE No violations on file — pop. 60
USFS GROVELAND RANGER STN. No violations on file — pop. 60
USFS SANDBAR FLAT CAMPGD No violations on file — pop. 60
USFS LOST CLAIM No violations on file — pop. 60
PEACH GROWERS TRACT IMPROV ASSOC No violations on file — pop. 60
LELAND MEADOW WATER DISTRICT No violations on file — pop. 59
HULL CREEK CAMPGROUND No violations on file — pop. 55
MOUNTAIN VIEW MOTEL No violations on file — pop. 54
PONDEROSA MOBILE HOME PARK Open violation — pop. 52
USFS CHERRY VALLEY CAMPGD No violations on file — pop. 51
YOSEMITE NPS-HODGDON MEADOW No violations on file — pop. 51
CHINESE CAMP STORE Older violation on record — pop. 50
WILCOXSONS RESORT No violations on file — pop. 50
TWIN PINES MOBILE HOME PARK No violations on file — pop. 50
TERRACED MOBILE HOME PARK No violations on file — pop. 50
SONORA UNION H S - AGRI CAMPUS No violations on file — pop. 50
EVERGREEN LODGE No violations on file — pop. 50
YAPPS LEARNING CENTER No violations on file — pop. 50
PINOCCHIO'S No violations on file — pop. 50
COW CREEK PERMITTEES ASSOCIATION No violations on file — pop. 50
TELELI GOLF CLUB No violations on file — pop. 50
LAKE DON PEDRO HOMEOWNERS No violations on file — pop. 50
LILAC TERRACE WATER COMPANY No violations on file — pop. 49
LYONS LAKE CAMPGROUND No violations on file — pop. 45
JAMES TAYLOR No violations on file — pop. 44
USFS BLACK OAK CAMPGROUND No violations on file — pop. 44
DARDANELLES RESORT No violations on file — pop. 42
SIDNEY HATLER No violations on file — pop. 40
ARMY CORPS OF ENGRS No violations on file — pop. 40
HENRY W. RUOFF No violations on file — pop. 40
CEDARROCK WATER ASSOCIATION No violations on file — pop. 40
STENT SCHOOL - WATCH No violations on file — pop. 40
DELORO VALLEY WATER SYSTEM Older violation on record — pop. 40
APPLE VALLEY FARMS No violations on file — pop. 40 — serves SONORA
YOSEMITE RIVERSIDE INN No violations on file — pop. 39
CHINESE CAMP SCHOOL No violations on file — pop. 36
CAMP TUOLUMNE TRAILS No violations on file — pop. 36
U.S.F.S. No violations on file — pop. 35
CARL ANDERSON No violations on file — pop. 35
J.D. MORRISON, OWNER No violations on file — pop. 34
LONG BARN U.S.F. STATION No violations on file — pop. 32
DON LYDICK No violations on file — pop. 30
E. RAMSEY, OWNER No violations on file — pop. 30
OAK RIDGE RANCH No violations on file — pop. 30
CAMP BEREA No violations on file — pop. 30
RUBE'S PANCAKE HOUSE No violations on file — pop. 30
SPICER MEADOW CAMPGROUND No violations on file — pop. 30
WAGNER TRACT IMPROVEMENT ASSOC No violations on file — pop. 30
ROBERTS MOTEL & APARTMENTS No violations on file — pop. 28
TERRIBLE HERBST OIL COMPANY No violations on file — pop. 28
USFS RIVERSIDE DAY USE No violations on file — pop. 28
PINECREST ELEMENTARY SCHOOL Open violation — pop. 28
MAYNORDS RECOVERY CENTER No violations on file — pop. 27
HOUSEBOAT MINI MART No violations on file — pop. 27
CARR S FAMILY RESTAURANT No violations on file — pop. 26
USFS STRAWBERRY ADMIN. SITE No violations on file — pop. 26
LONG BARN LODGE INC. No violations on file — pop. 26
NATURE WHOLE FOOD DEPOT No violations on file — pop. 26 — serves SONORA
YOSEMITE NPS-TIOGA PASS No violations on file — pop. 25 — serves NC TIOGA PASS
YOSEMITE NPS-MATHER RANGER No violations on file — pop. 25
KOUNTRY KITC HEN No violations on file — pop. 25
SOSCOL HOUSE No violations on file — pop. 25
YOSEMITE NPS-CASCADE No violations on file — pop. 25 — serves NC NEVADA FALLS
GEORGE REED INC. No violations on file — pop. 25
STONYBROOK MHP No violations on file — pop. 25
W.S. CHESTER No violations on file — pop. 25
CARL MATHESON No violations on file — pop. 25
W.J. COVINGTON No violations on file — pop. 25
SNIDER LUMBER PRODUCTS CO Older violation on record — pop. 25
EAST SONORA MEDICAL CENTER No violations on file — pop. 25
SARDELLA'S PACK STATION No violations on file — pop. 25
CLUB 108 No violations on file — pop. 25
CONFIDENCE INN & LIQUOR STORE No violations on file — pop. 25
TINKERS DAM No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
BLM BUREAU OF LAND MANAGEMENT No violations on file — pop. 25 — serves HUNTING CREEK S
BLM BUREAU OF LAND MANAGEMENT No violations on file — pop. 25
DEPARTMENT OF TRANSPORTATION No violations on file — pop. 25
MI WUK MOTOR LODGE No violations on file — pop. 25
WIGWAM ROAD APARTMENTS No violations on file — pop. 25
MARVIN SILVERMAN No violations on file — pop. 25
STAGE STOP STORE & SANDWICH No violations on file — pop. 25
ICE HOUSE No violations on file — pop. 25
SONORA MINING CORP01 No violations on file — pop. 25
PACIFIC ULTRAPOWER No violations on file — pop. 25
SUGAR PINE RANCH MOTEL No violations on file — pop. 25
LAST CHANCE WATER SYSTEM No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
USFS STANISLAUS NF No violations on file — pop. 25
WISHING WELL No violations on file — pop. 25
USFS CARLON CAMPGD No violations on file — pop. 25
LA CASA LOMA RIVER STORE No violations on file — pop. 25
THOMASON TUOLUMNE RD. PROP (STEVE'S PLAC No violations on file — pop. 25
SHAWS FLAT ELEMENTARY SCHOOL No violations on file — pop. 24
WINKIN LANTERN Older violation on record — pop. 24
SIERRA VILLAGE MOBILE HOME PARK Open violation — pop. 22
SIERRA TRAILER PARK No violations on file — pop. 21
SYLVAN COURT MOBILE HOME PARK No violations on file — pop. 20
NORTH AIRPORT WATER ASSOCIATIO No violations on file — pop. 17
STONY BROOK MOBILE HOME PARK No violations on file — pop. 14
SOULSBYVILLE WATER WEST No violations on file — pop. 14
TUO. CO. SUPERINT. OF SCHOO No violations on file — pop. 13
COLUMBIA GEM MOTEL No violations on file — pop. 8
WOODS CREEK TRAILER PARK No violations on file — pop. 4
COLUMBIA HILLS APARTMENTS Older violation on record — pop. 4
T. BART MOBILE HOME PARK No violations on file — pop. 2
O'SHAUGHNESSY BACKPACK WELL No violations on file — pop. 1
RED BARN No violations on file — pop. 0
LOST DUTCHMAN MINING ASSOC No violations on file — pop. 0
OAKHAVEN No violations on file — pop. 0
TUD - GIBBS RANCH WATER SYSTEM No violations on file — pop. 0
TUD-CUESTA SERENA No violations on file — pop. 0 — serves SONORA VICINITY
TUD - SUGAR PINE WATER SYSTEM No violations on file — pop. 0
USFS STANISLAUS NF No violations on file — pop. 0
USFS STANISLAUS NF No violations on file — pop. 0
USFS STANISLAUS NF No violations on file — pop. 0
BLUE MOUNTAIN MINERALS No violations on file — pop. 0
CURTIS CREEK ELEMENTARY SCHOOL No violations on file — pop. 0
TUD-CURTIS CREEK RANCHES Older violation on record — pop. 0
CAMP JOHN MENSINGER No violations on file — pop. 0
CHRISTIAN HEIGHTS ASEMBLY OF GOD No violations on file — pop. 0
TUD-SCENIC VIEW/SCENIC BROOK No violations on file — pop. 0

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