HERMISTON, CITY OF
OR · PWS ID OR4100372 · Community water system
91
contaminants tested
16
detected
20,000
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0100 ug/L | 5/10 | 2024 |
| PFHxS | 0.0120 ug/L | 5/10 | 2024 |
| PFOS | 0.0120 ug/L | 5/10 | 2024 |
| PFHxA | 0.0039 ug/L | 1/11 | 2024 |
| PFPeA | 0.0042 ug/L | 1/11 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 58.6 UG/L | 140/140 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 72.7 UG/L | 136/140 | SYR4 | 2012–2019 |
| COPPER, FREE | 377 UG/L | 44/73 | SYR4 | 2014–2017 |
| LEAD SUMMARY | 0.0060 mg/L | 19/19 | LCR | 2023 |
| Nitrate | 6600 UG/L | 16/82 | SYR4 | 2012–2019 |
| Lead | 14 UG/L | 6/73 | SYR4 | 2014–2017 |
| lithium | 32 ug/L | 5/11 | UCMR-5 | 2024 |
| Combined Uranium | 7.29 UG/L | 2/6 | SYR4 | 2015–2018 |
| Gross Alpha, Excl. Radon and U | 7.46 PCI/L | 2/6 | SYR4 | 2015–2018 |
| Arsenic | 9 UG/L | 1/6 | SYR4 | 2012–2014 |
| Xylenes, Total | 0.6600 UG/L | 1/20 | SYR4 | 2012–2019 |
75 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneCHLOROBENZENECarbofuranCarbon tetrachlorideChlordaneCombined Radium (-226 and -228)DICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMethoxychlorNEtFOSAANFDHANMeFOSAAOXAMYLPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFMBAPFMPAPFNAPFOAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chloridecis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene