RIVERSIDE HIGHLAND WATER COMPANY
CA · PWS ID CA3610057 · Community water system
81
contaminants tested
28
detected
20,188
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxA | 0.0140 ug/L | 4/6 | 2025 |
| PFHxS | 0.0140 ug/L | 4/6 | 2025 |
| PFBS | 0.0130 ug/L | 3/6 | 2025 |
| PFBA | 0.0100 ug/L | 2/6 | 2025 |
| PFHpA | 0.0082 ug/L | 2/6 | 2025 |
| PFOA | 0.0180 ug/L | 2/6 | 2025 |
| PFOS | 0.0190 ug/L | 2/6 | 2025 |
| PFPeA | 0.0170 ug/L | 2/6 | 2025 |
| PFPeS | 0.0040 ug/L | 1/6 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 11000 UG/L | 186/186 | SYR4 | 2012–2019 |
| TTHM | 28 UG/L | 55/72 | SYR4 | 2014–2019 |
| Chloroform | 1.9 UG/L | 40/75 | SYR4 | 2014–2019 |
| Dibromochloromethane | 11 UG/L | 38/81 | SYR4 | 2013–2019 |
| Bromoform | 12 UG/L | 37/80 | SYR4 | 2013–2019 |
| LEAD SUMMARY | 0.0080 mg/L | 28/28 | LCR | 2025 |
| Bromodichloromethane | 3.1 UG/L | 26/81 | SYR4 | 2013–2019 |
| Dibromoacetic acid | 4 UG/L | 19/72 | SYR4 | 2014–2019 |
| Fluoride | 1200 UG/L | 19/19 | SYR4 | 2012–2019 |
| Combined Uranium | 19.966 UG/L | 17/17 | SYR4 | 2013–2018 |
| Total Haloacetic Acids (HAA5) | 4.6 UG/L | 14/72 | SYR4 | 2014–2019 |
| Chromium | 3 UG/L | 11/23 | SYR4 | 2012–2019 |
| Barium | 65 UG/L | 9/19 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 2 UG/L | 7/72 | SYR4 | 2014–2019 |
| Monochloroacetic acid | 3.5 UG/L | 4/72 | SYR4 | 2014–2019 |
| lithium | 11 ug/L | 3/6 | UCMR-5 | 2025 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0490 UG/L | 2/14 | SYR4 | 2013–2018 |
| Arsenic | 3.3 UG/L | 2/19 | SYR4 | 2012–2019 |
| Selenium | 5 UG/L | 1/19 | SYR4 | 2012–2019 |
53 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalBenzeneBeryllium, TotalCHLOROBENZENECOPPER, FREECYANIDECadmiumCarbon tetrachlorideDICHLOROMETHANEDichloroacetic AcidETHYLENE DIBROMIDEEthylbenzeneHFPO-DALeadMercuryNEtFOSAANFDHANMeFOSAANitritePFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFNAPFTAPFTrDAPFUnAStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene