GSWC - CLAREMONT
CA · PWS ID CA1910024 · Community water system
44
contaminants tested
19
detected
39,730
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxA | 0.0084 ug/L | 8/26 | 2024 |
| PFPeA | 0.0064 ug/L | 8/26 | 2024 |
| PFBS | 0.0051 ug/L | 5/26 | 2024 |
| PFOA | 0.0129 ug/L | 5/26 | 2024 |
| PFHpA | 0.0046 ug/L | 4/26 | 2024 |
| PFHxS | 0.0037 ug/L | 3/26 | 2024 |
| PFOS | 0.0104 ug/L | 1/26 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 68 UG/L | 261/473 | SYR4 | 2012–2019 |
| Chloroform | 27 UG/L | 251/477 | SYR4 | 2012–2019 |
| Bromodichloromethane | 21 UG/L | 140/459 | SYR4 | 2012–2019 |
| Dibromochloromethane | 29 UG/L | 140/460 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 38 UG/L | 125/128 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 16 UG/L | 119/128 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 8.3 UG/L | 116/128 | SYR4 | 2012–2019 |
| Bromoform | 13 UG/L | 115/460 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 12 UG/L | 106/128 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 6.2 UG/L | 42/128 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0057 mg/L | 38/38 | LCR | 2026 |
| Monochloroacetic acid | 5.7 UG/L | 36/128 | SYR4 | 2012–2019 |
25 contaminants tested, none detected
11Cl-PF3OUdS4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONACOPPER, FREEHFPO-DALeadNEtFOSAANFDHANMeFOSAAPFBAPFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAlithium