Serving roughly 24,834 people in Stanislaus County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for RIVERBANK, CITY OF
1 water provider directly on file, serving roughly 24,834 people in Stanislaus County, California.
Quick answer: RIVERBANK, CITY OF has no violation currently counted toward its compliance status. EPA's record shows a Coliform (TCR) violation dating to 03/01/1993 (33 years ago) — because it's more than five years past its deadline, EPA's policy no longer treats it as part of this system's current standing, though it remains on the public record.
Lead Summary
Aggressive Index
Langelier Index (pH(s))
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Nitrate-Nitrite
Nitrate
Perfluoroctanesulfonicacid (PFOS)
Perfluorobutanesulfonicacid (PFBS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluoropentanoicacid (PFPEA)
Turbidity
pH, Field
Iron
Manganese
TTHM
Chromium, Hex
Perchlorate
Bromoform
Dibromochloromethane
Chromium
Barium
Arsenic
Zinc
Conductivity (at 25°C)
Utility RIVERBANK, CITY OFPopulation served 24,834Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Iron
Detected: 40 UG/L (ppb)
9/24/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 2.2 UG/L (ppb)
9/24/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 3.2 UG/L (ppb)
3/19/2025
Chromium
Detected: 10 UG/L (ppb)
9/2/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Barium
Detected: 159 UG/L (ppb)
9/24/2025
Arsenic
Detected: 2 UG/L (ppb)
9/24/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Zinc
Detected: 10 UG/L (ppb)
9/24/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 4 UG/L (ppb)
9/24/2025
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.
Bromoform
Detected: 2.3 UG/L (ppb)
9/24/2025
Dibromochloromethane
Detected: 1.3 UG/L (ppb)
9/24/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 12 MG/L (ppm)
9/24/2025
Sulfate
Detected: 10.1 MG/L (ppm)
9/24/2025
Nitrate-Nitrite
Detected: 4 MG/L (ppm)
9/24/2025
Nitrate
Detected: 4 MG/L (ppm)
9/24/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 17 MG/L (ppm)
9/24/2025
Potassium
Detected: 4 MG/L (ppm)
9/24/2025
Sodium
Detected: 26 MG/L (ppm)
9/24/2025
Calcium
Detected: 55 MG/L (ppm)
9/24/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.3 LANG
9/24/2025
Hardness, Total (ASCACO3)
Detected: 207 MG/L (ppm)
9/24/2025
pH, Field
Detected: 7.65 PH
9/24/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 270 MG/L (ppm)
9/24/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12.2 AGGR
9/24/2025
Alkalinity, Total
Detected: 220 MG/L (ppm)
9/24/2025
TDS
Detected: 330 MG/L (ppm)
9/24/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 3.3 NG/L (ppt)
9/24/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.6 NG/L (ppt)
6/25/2025
Perfluoroctanoicacid (PFOA)
Detected: 2.3 NG/L (ppt)
6/25/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 2.1 NG/L (ppt)
6/25/2025
Perfluoropentanoicacid (PFPEA)
Detected: 2.3 NG/L (ppt)
6/25/2025
Turbidity
Detected: 0.25 NTU
9/24/2025
A measure of water cloudiness from suspended particles.
Perchlorate
Detected: 4.3 UG/L (ppb)
9/24/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Conductivity (at 25°C)
Detected: 498 UMHO/CM
9/24/2025
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.