SAN JOAQUIN COUNTY-MOKELUMNE ACRES Water Quality Report
Serving roughly 3,802 people in San Joaquin County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for SAN JOAQUIN COUNTY-MOKELUMNE ACRES
1 water provider directly on file, serving roughly 3,802 people in San Joaquin County, California.
Quick answer: SAN JOAQUIN COUNTY-MOKELUMNE ACRES has no violations on file. One reading is worth knowing about: PFBS was measured at 0.0075µg/L, among the highest of the 571 providers on file in this area. It's the most notable figure in this system's record among its 571 local peers.
Lead Summary
PFPEA
PFBS
PFHXA
PFOA
PFHXS
PFOS
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Iron
Utility SAN JOAQUIN COUNTY-MOKELUMNE ACRESPopulation served 3,802Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Iron
Detected: 260 UG/L (ppb)
3/19/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 3.9 MG/L (ppm)
7/14/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFPEA
Detected: 0.0033 µg/L (ppb)
7/14/2025
PFBS
Detected: 0.0075 µg/L (ppb)
7/14/2025
PFHXA
Detected: 0.0034 µg/L (ppb)
7/14/2025
PFOA
Detected: 0.0079 µg/L (ppb)
7/14/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXS
Detected: 0.0043 µg/L (ppb)
7/14/2025
PFOS
Detected: 0.0135 µg/L (ppb)
7/14/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Other
Additional substances tested that don't fit neatly into the categories above
Perfluorobutanesulfonicacid (PFBS)
Detected: 7.9 NG/L (ppt)
9/16/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2.2 NG/L (ppt)
9/16/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 5 NG/L (ppt)
9/16/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 2.4 NG/L (ppt)
9/16/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 4.4 NG/L (ppt)
9/16/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 3.8 NG/L (ppt)
9/16/2025
Perfluorobutanoicacid (PFBA)
Detected: 2.5 NG/L (ppt)
9/16/2025
Perfluoropentanoicacid (PFPEA)
Detected: 3.9 NG/L (ppt)
9/16/2025
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.