LEWISTON CITY OF
ID · PWS ID ID2350014 · Community water system
107
contaminants tested
24
detected
15,001
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0056 ug/L | 1/14 | 2025 |
| PFHxA | 0.0043 ug/L | 1/14 | 2025 |
| PFPeA | 0.0047 ug/L | 1/14 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 7190 UG/L | 72/104 | SYR4 | 2012–2019 |
| TTHM | 53.1 UG/L | 48/64 | SYR4 | 2012–2019 |
| Barium | 135 UG/L | 38/38 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 47.1 UG/L | 38/44 | SYR4 | 2012–2019 |
| Fluoride | 930 UG/L | 37/38 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 7420 UG/L | 32/46 | SYR4 | 2012–2019 |
| Chromium | 3.1 UG/L | 20/38 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0080 mg/L | 17/17 | LCR | 2025 |
| lithium | 43.8 ug/L | 10/14 | UCMR-5 | 2025 |
| Gross Beta Particle Activity | 8.36 PCI/L | 8/8 | SYR4 | 2013–2019 |
| Arsenic | 2.2 UG/L | 7/42 | SYR4 | 2012–2019 |
| Combined Radium (-226 and -228) | 1 PCI/L | 5/7 | SYR4 | 2012–2017 |
| Selenium | 3.52 UG/L | 5/38 | SYR4 | 2012–2019 |
| Asbestos | -0.13 MFL | 4/4 | SYR4 | 2013 |
| Combined Uranium | 28.4 UG/L | 4/8 | SYR4 | 2012–2019 |
| Nitrite | 377 UG/L | 3/48 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon and U | 7.5 PCI/L | 2/4 | SYR4 | 2012–2019 |
| Bromodichloromethane | 3.2 UG/L | 1/1 | SYR4 | 2019 |
| Cadmium | 1.07 UG/L | 1/38 | SYR4 | 2012–2019 |
| Chloroform | 6.31 UG/L | 1/1 | SYR4 | 2019 |
| Dibromochloromethane | 1.15 UG/L | 1/1 | SYR4 | 2019 |
83 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalBromoformCHLOROBENZENECYANIDECarbofuranCarbon tetrachlorideChlordaneDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAAOXAMYLPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFOAPFOSPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene