FAIRFAX COUNTY WATER AUTHORITY
VA · PWS ID VA6059501 · Community water system
111
contaminants tested
32
detected
1,121,613
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxA | 0.0171 ug/L | 10/24 | 2025 |
| PFPeA | 0.0215 ug/L | 10/24 | 2025 |
| PFBS | 0.0081 ug/L | 5/24 | 2025 |
| 6:2 FTS | 0.0101 ug/L | 4/24 | 2025 |
| PFBA | 0.0176 ug/L | 3/24 | 2025 |
| PFHpA | 0.0056 ug/L | 3/24 | 2025 |
| PFOA | 0.0074 ug/L | 3/24 | 2025 |
| PFOS | 0.0057 ug/L | 2/24 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 104 UG/L | 492/492 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 60.5 UG/L | 489/492 | SYR4 | 2012–2019 |
| Bromodichloromethane | 21.8 UG/L | 484/484 | SYR4 | 2012–2019 |
| Chloroform | 86.4 UG/L | 484/484 | SYR4 | 2012–2019 |
| Dibromochloromethane | 8.84 UG/L | 484/484 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 33.2 UG/L | 480/484 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 26.2 UG/L | 434/484 | SYR4 | 2012–2019 |
| Nitrate | 2510 UG/L | 404/404 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 3.13 UG/L | 272/484 | SYR4 | 2012–2019 |
| Bromoform | 1.67 UG/L | 221/484 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 2520 UG/L | 197/197 | SYR4 | 2012–2019 |
| Fluoride | 800 UG/L | 158/164 | SYR4 | 2012–2019 |
| COPPER, FREE | 558 UG/L | 126/285 | SYR4 | 2012–2019 |
| Lead | 2.4 UG/L | 83/187 | SYR4 | 2012–2019 |
| Barium | 53.2 UG/L | 53/63 | SYR4 | 2012–2019 |
| Monochloroacetic acid | 4 UG/L | 42/484 | SYR4 | 2012–2019 |
| Nitrite | 20 UG/L | 27/371 | SYR4 | 2012–2019 |
| Bromate | 10 UG/L | 23/638 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0130 mg/L | 17/17 | LCR | 2023 |
| Gross Beta Particle Activity | 5.99 PCI/L | 9/19 | SYR4 | 2013–2019 |
| Atrazine | 0.0900 UG/L | 3/12 | SYR4 | 2012–2017 |
| Combined Radium (-226 and -228) | 0.6910 PCI/L | 3/11 | SYR4 | 2013–2019 |
| Combined Uranium | 0.1120 UG/L | 1/11 | SYR4 | 2013–2019 |
| Gross Alpha, Excl. Radon and U | 3.01 PCI/L | 1/9 | SYR4 | 2013–2019 |
79 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 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalArsenicBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneChromiumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonobromoacetic acidNEtFOSAANFDHANMeFOSAAOXAMYLPFDAPFDoAPFEESAPFHpSPFHxSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene