Serving roughly 14,537 people in Stanislaus County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for CITY OF MODESTO - SALIDA
1 water provider directly on file, serving roughly 14,537 people in Stanislaus County, California.
Quick answer: CITY OF MODESTO - SALIDA has no violations on file. One reading is worth knowing about: Perfluoroheptanoicacid (PFHPA) was measured at 4.5NG/L, among the highest of the 442 providers on file in this area. It's the most notable figure in this system's record among its 442 local peers.
Lead Summary
Lithium
Aggressive Index
Magnesium
Potassium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluoropfmba
Perfluorohexanoicacid (PFHXA)
Perfluoropentanoicacid (PFPEA)
Perfluoropfeesa
Hfpo-Da
Perfluorohexanesulfonicacid4:2fts
Perfluoropfmpa
Perfluoropentanesulfonicacid (PFPES)
Perfluoroheptanoicacid (PFHPA)
Adona
Perfluorooctanesulfonicacid6:2fts
Perfluoroheptanesulfonicacid (PFHPS)
Nonafluoronfdha
Perfluorohexanesulfonicacid (PFHxS)
9cl-Pf3ons
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorononanoicacid (PFNA)
Perfluorodecanesulfonicacid8:2fts
pH
Iron
Chromium, Hex
Barium
Arsenic
Conductivity (at 25°C)
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Bromoform
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Utility CITY OF MODESTO - SALIDAPopulation served 14,537Owner 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: 230 UG/L (ppb)
5/7/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Chromium, Hex
Detected: 0.202 UG/L (ppb)
1/23/2025
Barium
Detected: 100 UG/L (ppb)
5/7/2025
Arsenic
Detected: 5.9 UG/L (ppb)
5/7/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 7.6 UG/L (ppb)
9/23/2025
TTHM
Detected: 17.38 UG/L (ppb)
9/23/2025
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: 12.9 UG/L (ppb)
9/23/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 2.92 UG/L (ppb)
9/23/2025
Dibromochloromethane
Detected: 1.56 UG/L (ppb)
9/23/2025
Bromoform
Detected: 1.17 UG/L (ppb)
9/9/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 11 MG/L (ppm)
5/7/2025
Sulfate
Detected: 15 MG/L (ppm)
5/7/2025
Nitrate
Detected: 2.4 MG/L (ppm)
10/1/2025
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: 13 MG/L (ppm)
5/7/2025
Potassium
Detected: 6.1 MG/L (ppm)
5/7/2025
Calcium
Detected: 43 MG/L (ppm)
5/7/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 161 MG/L (ppm)
5/7/2025
pH
Detected: 7.7 PH
5/7/2025
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
Lithium
Detected: 9.7 µg/L (ppb)
5/16/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 140 MG/L (ppm)
5/7/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.88 AGGR
5/7/2025
Alkalinity, Total
Detected: 140 MG/L (ppm)
5/7/2025
TDS
Detected: 230 MG/L (ppm)
5/7/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 5.2 NG/L (ppt)
6/11/2025
Perfluoropfmba
Detected: 4.6 NG/L (ppt)
6/11/2025
Perfluorohexanoicacid (PFHXA)
Detected: 5 NG/L (ppt)
6/11/2025
Perfluoropentanoicacid (PFPEA)
Detected: 5 NG/L (ppt)
6/11/2025
Perfluoropfeesa
Detected: 5.1 NG/L (ppt)
6/11/2025
Hfpo-Da
Detected: 5.1 NG/L (ppt)
6/11/2025
Perfluorohexanesulfonicacid4:2fts
Detected: 5.1 NG/L (ppt)
6/11/2025
Perfluoropfmpa
Detected: 4.4 NG/L (ppt)
6/11/2025
Perfluoropentanesulfonicacid (PFPES)
Detected: 5.2 NG/L (ppt)
6/11/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 4.5 NG/L (ppt)
6/11/2025
Adona
Detected: 4.1 NG/L (ppt)
6/11/2025
Perfluorooctanesulfonicacid6:2fts
Detected: 4.8 NG/L (ppt)
6/11/2025
Perfluoroheptanesulfonicacid (PFHPS)
Detected: 5.6 NG/L (ppt)
6/11/2025
Nonafluoronfdha
Detected: 4.7 NG/L (ppt)
6/11/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 6 NG/L (ppt)
6/11/2025
9cl-Pf3ons
Detected: 4.7 NG/L (ppt)
6/11/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 5.7 NG/L (ppt)
6/11/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 5.7 NG/L (ppt)
6/11/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorononanoicacid (PFNA)
Detected: 4.5 NG/L (ppt)
6/11/2025
Perfluorodecanesulfonicacid8:2fts
Detected: 4.7 NG/L (ppt)
6/11/2025
Conductivity (at 25°C)
Detected: 320 UMHO/CM
5/7/2025
Dichloroaceticacid
Detected: 4.2 UG/L (ppb)
9/23/2025
Trichloroaceticacid
Detected: 3.4 UG/L (ppb)
9/23/2025
Dibromoaceticacid
Detected: 1.3 UG/L (ppb)
6/10/2025
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.