OLYMPIA CITY OF
WA · PWS ID WA5363450 · Community water system
110
contaminants tested
23
detected
126,966
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0048 ug/L | 2/12 | 2024 |
| PFHxA | 0.0040 ug/L | 1/12 | 2024 |
| PFOA | 0.0043 ug/L | 1/12 | 2024 |
| PFOS | 0.0058 ug/L | 1/12 | 2024 |
| PFPeA | 0.0033 ug/L | 1/12 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 31.1 UG/L | 88/88 | SYR4 | 2012–2019 |
| Bromodichloromethane | 6.4 UG/L | 79/99 | SYR4 | 2012–2019 |
| Dibromochloromethane | 3 UG/L | 79/97 | SYR4 | 2012–2019 |
| Chloroform | 21.2 UG/L | 76/101 | SYR4 | 2012–2019 |
| Nitrate | 2630 UG/L | 76/96 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 5.9 UG/L | 40/91 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 3.9 UG/L | 37/91 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 2.2 UG/L | 21/96 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0120 mg/L | 14/14 | LCR | 2025 |
| Barium | 13 UG/L | 12/12 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 2460 UG/L | 11/12 | SYR4 | 2012–2019 |
| Arsenic | 2 UG/L | 6/12 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 1.7 UG/L | 6/96 | SYR4 | 2012–2019 |
| Bromoform | 0.6000 UG/L | 4/105 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 1.82 PCI/L | 3/13 | SYR4 | 2012–2019 |
| COPPER, FREE | 7 UG/L | 2/12 | SYR4 | 2012–2019 |
| Fluoride | 100 UG/L | 1/12 | SYR4 | 2012–2019 |
| Xylenes, Total | 0.4000 UG/L | 1/12 | SYR4 | 2012–2016 |
87 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-PF3ONSADONAAntimony, TotalAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneChromiumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOLeadMercuryMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chloridecis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene