CITY OF ATWATER
CA · PWS ID CA2410001 · Community water system
91
contaminants tested
27
detected
29,479
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxS | 0.0590 ug/L | 8/16 | 2024 |
| PFPeA | 0.0270 ug/L | 8/16 | 2024 |
| PFHxA | 0.0250 ug/L | 5/16 | 2024 |
| PFBS | 0.0078 ug/L | 3/16 | 2024 |
| PFHpA | 0.0120 ug/L | 3/16 | 2024 |
| PFOA | 0.0330 ug/L | 3/16 | 2024 |
| PFOS | 0.0450 ug/L | 3/16 | 2024 |
| PFBA | 0.0110 ug/L | 2/16 | 2024 |
| PFPeS | 0.0082 ug/L | 2/16 | 2024 |
| 6:2 FTS | 0.0130 ug/L | 1/16 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 17000 UG/L | 1574/1574 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.1500 UG/L | 137/188 | SYR4 | 2012–2019 |
| Dibromochloromethane | 3.2 UG/L | 34/96 | SYR4 | 2013–2019 |
| Barium | 160 UG/L | 33/33 | SYR4 | 2012–2018 |
| Total Haloacetic Acids (HAA5) | 15 UG/L | 30/96 | SYR4 | 2013–2019 |
| Arsenic | 9.7 UG/L | 28/34 | SYR4 | 2012–2018 |
| Fluoride | 200 UG/L | 25/25 | SYR4 | 2012–2018 |
| LEAD SUMMARY | 0.0050 mg/L | 25/25 | LCR | 2025 |
| Bromoform | 4.5 UG/L | 22/96 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 14 UG/L | 21/96 | SYR4 | 2013–2019 |
| TTHM | 8.3 UG/L | 19/96 | SYR4 | 2013–2019 |
| Bromodichloromethane | 1.5 UG/L | 14/96 | SYR4 | 2013–2019 |
| Dibromoacetic acid | 1.9 UG/L | 10/96 | SYR4 | 2013–2019 |
| Combined Uranium | 15.9728 UG/L | 5/8 | SYR4 | 2015 |
| Chloroform | 0.5300 UG/L | 3/96 | SYR4 | 2013–2019 |
| Dichloroacetic Acid | 3.1 UG/L | 2/96 | SYR4 | 2013–2019 |
| Lead | 1.1 UG/L | 1/25 | SYR4 | 2012–2015 |
64 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECOPPER, FREECadmiumCarbon tetrachlorideChromiumDICHLOROMETHANEDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateETHYLENE DIBROMIDEEthylbenzeneHEXACHLOROBENZENEHFPO-DAHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitritePFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFNAPFTAPFTrDAPFUnASeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
ATWATER