CAL-WATER SERVICE CO.-CHICO
CA · PWS ID CA0410002 · Community water system
111
contaminants tested
38
detected
114,925
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxS | 0.0221 ug/L | 19/74 | 2024 |
| PFOS | 0.0225 ug/L | 15/74 | 2024 |
| PFBS | 0.0096 ug/L | 6/74 | 2024 |
| PFHxA | 0.0060 ug/L | 2/74 | 2024 |
| PFOA | 0.0068 ug/L | 2/74 | 2024 |
| PFPeA | 0.0053 ug/L | 2/74 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 13542.372 UG/L | 1916/1984 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 400 UG/L | 697/1711 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 9.1 UG/L | 230/1711 | SYR4 | 2012–2019 |
| TTHM | 11.8 UG/L | 73/671 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 6900 UG/L | 54/60 | SYR4 | 2016–2019 |
| Chloroform | 4.55 UG/L | 41/671 | SYR4 | 2012–2019 |
| Styrene | 1.9 UG/L | 26/1711 | SYR4 | 2012–2019 |
| Bromodichloromethane | 3.08 UG/L | 23/671 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0025 mg/L | 23/23 | LCR | 2023 |
| Dibromochloromethane | 2.75 UG/L | 15/672 | SYR4 | 2012–2019 |
| Trichloroethylene | 1.18 UG/L | 11/1711 | SYR4 | 2012–2019 |
| Combined Uranium | 1.07578 UG/L | 7/14 | SYR4 | 2014–2018 |
| Arsenic | 2.5 UG/L | 5/164 | SYR4 | 2012–2019 |
| Xylenes, Total | 9.4 UG/L | 5/1700 | SYR4 | 2012–2019 |
| Barium | 42.42 UG/L | 4/163 | SYR4 | 2012–2019 |
| Fluoride | 110 UG/L | 4/160 | SYR4 | 2012–2019 |
| Antimony, Total | 0.0210 UG/L | 3/163 | SYR4 | 2012–2019 |
| COPPER, FREE | 0.9590 UG/L | 3/174 | SYR4 | 2012–2019 |
| Chromium | 12 UG/L | 3/161 | SYR4 | 2012–2019 |
| Lead | 0.0930 UG/L | 3/163 | SYR4 | 2012–2019 |
| Toluene | 2.2 UG/L | 3/1711 | SYR4 | 2012–2019 |
| lithium | 11.7 ug/L | 3/74 | UCMR-5 | 2024 |
| 1,1-Dichloroethylene | 0.5800 UG/L | 2/1711 | SYR4 | 2012–2019 |
| Cadmium | 0.0120 UG/L | 2/163 | SYR4 | 2012–2019 |
| Ethylbenzene | 1.2 UG/L | 2/1711 | SYR4 | 2012–2019 |
| Selenium | 0.2170 UG/L | 2/162 | SYR4 | 2012–2019 |
| Beryllium, Total | 0.0020 UG/L | 1/162 | SYR4 | 2012–2019 |
| Bromoform | 1.27 UG/L | 1/671 | SYR4 | 2012–2019 |
| Carbon tetrachloride | 0.7200 UG/L | 1/1710 | SYR4 | 2012–2019 |
| DICHLOROMETHANE | 0.8500 UG/L | 1/1711 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.2 UG/L | 1/108 | SYR4 | 2015–2019 |
| Nitrite | 195 UG/L | 1/163 | SYR4 | 2012–2019 |
73 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneCHLOROBENZENECYANIDECarbofuranChlordaneDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDibromoacetic acidDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAAOXAMYLPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineThallium, TotalTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidVinyl chlorideo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene