TOWN OF HEMPSTEAD WATER DEPARTMENT
NY · PWS ID NY2900000 · Community water system
112
contaminants tested
43
detected
110,000
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFPeA | 0.0042 ug/L | 2/26 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 15450 UG/L | 5348/5368 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 15450 UG/L | 2037/2441 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 20 UG/L | 1221/3573 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 87.1 UG/L | 1091/3825 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 28 UG/L | 763/3715 | SYR4 | 2012–2019 |
| Trichloroethylene | 19.39 UG/L | 666/3332 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 76.5 UG/L | 576/3828 | SYR4 | 2012–2019 |
| Barium | 251 UG/L | 269/339 | SYR4 | 2012–2019 |
| Carbon tetrachloride | 19.87 UG/L | 247/3826 | SYR4 | 2012–2019 |
| Lead | 8.37 UG/L | 125/303 | SYR4 | 2012–2019 |
| COPPER, FREE | 330 UG/L | 106/331 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 3 UG/L | 69/3828 | SYR4 | 2012–2019 |
| Benzene | 12.92 UG/L | 37/3829 | SYR4 | 2012–2019 |
| ETHYLENE DIBROMIDE | 0.0540 UG/L | 36/846 | SYR4 | 2012–2019 |
| Chromium | 26 UG/L | 27/356 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 6.4 PCI/L | 27/27 | SYR4 | 2012–2018 |
| Combined Radium (-226 and -228) | 3.38 PCI/L | 19/40 | SYR4 | 2012–2018 |
| Arsenic | 5 UG/L | 15/397 | SYR4 | 2012–2019 |
| Combined Uranium | 5.17 UG/L | 15/27 | SYR4 | 2012–2018 |
| 1,2-Dichloropropane | 0.8900 UG/L | 14/3829 | SYR4 | 2012–2019 |
| Bromoform | 3.3 UG/L | 14/1014 | SYR4 | 2012–2019 |
| Dibromochloromethane | 3.7 UG/L | 13/1016 | SYR4 | 2012–2019 |
| Chloroform | 15.4 UG/L | 10/1014 | SYR4 | 2012–2019 |
| Selenium | 4 UG/L | 10/356 | SYR4 | 2012–2019 |
| trans-1,2-Dichloroethylene | 1.21 UG/L | 10/3830 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0060 mg/L | 9/9 | LCR | 2023 |
| Thallium, Total | 3.2 UG/L | 9/367 | SYR4 | 2012–2019 |
| 1,1,2-Trichloroethane | 8.6 UG/L | 7/3829 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon and U | 6.36 PCI/L | 7/24 | SYR4 | 2012–2018 |
| Antimony, Total | 1.6 UG/L | 6/356 | SYR4 | 2012–2019 |
| TTHM | 4 UG/L | 6/460 | SYR4 | 2012–2019 |
| Beryllium, Total | 1 UG/L | 5/356 | SYR4 | 2012–2019 |
| Bromodichloromethane | 4.7 UG/L | 5/1016 | SYR4 | 2012–2019 |
| Cadmium | 0.1000 UG/L | 5/356 | SYR4 | 2012–2019 |
| Vinyl chloride | 1.74 UG/L | 5/3830 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.7 UG/L | 3/60 | SYR4 | 2013–2018 |
| Mercury | 2 UG/L | 3/356 | SYR4 | 2012–2019 |
| Toluene | 1.56 UG/L | 3/3830 | SYR4 | 2012–2019 |
| Ethylbenzene | 0.9800 UG/L | 2/3829 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 1.7 UG/L | 2/24 | SYR4 | 2017–2018 |
| Di(2-ethylhexyl) phthalate | 0.6400 UG/L | 1/151 | SYR4 | 2012–2019 |
| Styrene | 1.17 UG/L | 1/3829 | SYR4 | 2012–2019 |
69 contaminants tested, none detected
1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAtrazineBHC-GAMMABenzo(a)pyreneCHLOROBENZENECYANIDECarbofuranChlordaneDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDibromoacetic acidDinosebDiquatEndothallEndrinFluorideGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFHxSPFMBAPFMPAPFNAPFOAPFOSPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic Acidlithiumo-Dichlorobenzenep-Dichlorobenzene
Areas served
HEMPSTEAD (T)