COUPEVILLE TOWN OF
WA · PWS ID WA5315550 · Community water system
106
contaminants tested
25
detected
4,142
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxA | 0.0170 ug/L | 2/2 | 2025 |
| PFPeA | 0.0120 ug/L | 2/2 | 2025 |
| PFBA | 0.0053 ug/L | 1/2 | 2025 |
| PFBS | 0.0067 ug/L | 1/2 | 2025 |
| PFHpA | 0.0033 ug/L | 1/2 | 2025 |
| PFHxS | 0.0038 ug/L | 1/2 | 2025 |
| PFOA | 0.0098 ug/L | 1/2 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 2460 UG/L | 40/72 | SYR4 | 2012–2019 |
| Bromodichloromethane | 9 UG/L | 17/21 | SYR4 | 2013–2019 |
| Bromoform | 20.4 UG/L | 17/21 | SYR4 | 2013–2019 |
| TTHM | 44.5 UG/L | 17/17 | SYR4 | 2013–2019 |
| Dibromochloromethane | 17.8 UG/L | 16/20 | SYR4 | 2013–2019 |
| Chloroform | 3.4 UG/L | 15/21 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0110 mg/L | 12/12 | LCR | 2025 |
| Total Haloacetic Acids (HAA5) | 6.5 UG/L | 9/17 | SYR4 | 2013–2019 |
| Dibromoacetic acid | 4.5 UG/L | 8/17 | SYR4 | 2013–2019 |
| Arsenic | 8.3 UG/L | 6/6 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 10.1 PCI/L | 5/5 | SYR4 | 2018 |
| Nitrate-Nitrite | 1700 UG/L | 4/6 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 1.9 UG/L | 3/17 | SYR4 | 2013–2019 |
| Barium | 260 UG/L | 2/6 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 2 UG/L | 2/17 | SYR4 | 2013–2019 |
| Fluoride | 640 UG/L | 2/6 | SYR4 | 2012–2019 |
| Combined Radium (-226 and -228) | 0.5000 PCI/L | 1/1 | SYR4 | 2012 |
| Lead | 1.5 UG/L | 1/7 | SYR4 | 2012–2019 |
81 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, TotalCHLOROBENZENECOPPER, FREECYANIDECadmiumCarbon tetrachlorideChlordaneChromiumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebETHYLENE DIBROMIDEEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitritePFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFNAPFOSPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene