LATHROP is served by 1 water provider 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 LATHROP, CA
1 water provider on file serving this city.
Quick answer: LATHROP's water has no violations on file and no single reading stands out against its peers (1 other providers in this area). It serves roughly 35,080 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
PFOS
PFHXS
PFBS
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Monochloroaceticacid
Arsenic
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorobutanoicacid (PFBA)
Radium-228
Gross Alpha Particle Activity
Chromium, Hex
Perfluoroheptanoicacid (PFHPA)
Perfluorononanoicacid (PFNA)
Perfluorohexanoicacid (PFHXA)
Perfluoropentanoicacid (PFPEA)
Perfluoropentanesulfonicacid (PFPES)
Perfluoroheptanesulfonicacid (PFHPS)
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Arsenic
Detected: 2 UG/L (ppb)
6/16/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Chromium, Hex
Detected: 1.5 UG/L (ppb)
2/10/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 23 UG/L (ppb)
8/11/2025
TTHM
Detected: 28 UG/L (ppb)
8/11/2025
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: 27 UG/L (ppb)
8/11/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 8 UG/L (ppb)
2/3/2025
Bromodichloromethane
Detected: 1 UG/L (ppb)
8/11/2025
Dibromochloromethane
Detected: 4 UG/L (ppb)
2/3/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 5.6 MG/L (ppm)
5/5/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 3.44 PCI/L
5/5/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFOS
Detected: 0.013 µg/L (ppb)
7/8/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXS
Detected: 0.0035 µg/L (ppb)
4/1/2024
PFBS
Detected: 0.0037 µg/L (ppb)
7/8/2024
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 12 UG/L (ppb)
8/11/2025
Trichloroaceticacid
Detected: 11 UG/L (ppb)
8/11/2025
Dibromoaceticacid
Detected: 4 UG/L (ppb)
2/3/2025
Monochloroaceticacid
Detected: 3 UG/L (ppb)
5/12/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 5.6 NG/L (ppt)
8/4/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 3.3 NG/L (ppt)
8/4/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 11 NG/L (ppt)
8/4/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 27 NG/L (ppt)
8/4/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanoicacid (PFBA)
Detected: 15 NG/L (ppt)
8/4/2025
Radium-228
Detected: 0.776 PCI/L
1/27/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 3 NG/L (ppt)
8/4/2025
Perfluorononanoicacid (PFNA)
Detected: 2.5 NG/L (ppt)
8/4/2025
Perfluorohexanoicacid (PFHXA)
Detected: 4 NG/L (ppt)
8/4/2025
Perfluoropentanoicacid (PFPEA)
Detected: 7.9 NG/L (ppt)
8/4/2025
Perfluoropentanesulfonicacid (PFPES)
Detected: 2.5 NG/L (ppt)
8/4/2025
Perfluoroheptanesulfonicacid (PFHPS)
Detected: 2.2 NG/L (ppt)
2/10/2025
Filtration considerations: General system types, not a specific product recommendation.