GROVELAND COMMUNITY SERV DIST Water Quality Report
Serving roughly 3,400 people in Tuolumne County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for GROVELAND COMMUNITY SERV DIST
1 water provider directly on file, serving roughly 3,400 people in Tuolumne County, California.
Quick answer: GROVELAND COMMUNITY SERV DIST currently has an open health-based violation on file: Lead And Copper Rule Revisions, a compliance issue since 10/17/2024. This is active, not historical — see the violation detail below for what EPA's enforcement record shows.
Lead Summary
PFOS
PFBA
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dichloroaceticacid
Trichloroaceticacid
Monochloroaceticacid
Aggressive Index
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Chloride
Sulfate
pH
Odor
Iron
Conductivity (at 25°C)
Color
Utility GROVELAND COMMUNITY SERV DISTPopulation served 3,400Owner Private
Open violation on file
Violations on file
Total Haloacetic Acids (HAA5)
Older/archived health-based violation
Found at 1 of 1 provider
Lead And Copper Rule Revisions
Currently open health violation
Found at 1 of 1 provider
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Iron
Detected: 100 UG/L (ppb)
8/4/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 50.6 UG/L (ppb)
7/10/2025
TTHM
Detected: 26.88 UG/L (ppb)
7/10/2025
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: 26.88 UG/L (ppb)
7/10/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.07 UG/L (ppb)
7/9/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 5.2 MG/L (ppm)
8/4/2025
Sulfate
Detected: 6.1 MG/L (ppm)
8/4/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Calcium
Detected: 1.1 MG/L (ppm)
8/4/2025
Magnesium
Detected: 2.5 MG/L (ppm)
8/4/2025
Potassium
Detected: 2 MG/L (ppm)
8/4/2025
Sodium
Detected: 4.9 MG/L (ppm)
8/4/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 30 MG/L (ppm)
8/4/2025
pH
Detected: 5.82 PH
8/4/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
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
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 8 MG/L (ppm)
8/4/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 33.8 UG/L (ppb)
7/10/2025
Trichloroaceticacid
Detected: 14.6 UG/L (ppb)
7/10/2025
Monochloroaceticacid
Detected: 2.2 UG/L (ppb)
7/10/2025
Aggressive Index
Detected: 7.16 AGGR
8/4/2025
Alkalinity, Total
Detected: 8 MG/L (ppm)
8/4/2025
TDS
Detected: 18 MG/L (ppm)
8/4/2025
Odor
Detected: 1 TON
8/4/2025
Conductivity (at 25°C)
Detected: 92 UMHO/CM
8/4/2025
Color
Detected: 10 UNITS
8/4/2025
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.