Compliance record
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfpea | 0.0042 µg/L | 2/26 | 2024 |
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 9230 µg/L 92% of the EPA limit 10000 µg/L
worst single sample: 15450 µg/L | 5348/5368 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 9252 µg/L 93% of the EPA limit 10000 µg/L
worst single sample: 15450 µg/L | 2037/2441 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 15.9 µg/L 318% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 20 µg/L | 1221/3573 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 14.07 µg/L 20% of the EPA limit 70 µg/L
worst single sample: 87.1 µg/L | 1091/3825 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 16.99 µg/L 243% of the EPA limit, at the 95th percentile of samples — 7 µg/L
worst single sample: 28 µg/L | 763/3715 | SYR4 | 2012–2019 |
| Trichloroethylene | 17.2375 µg/L 345% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 19.39 µg/L | 666/3332 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 19.32 µg/L 9.7% of the EPA limit 200 µg/L
worst single sample: 76.5 µg/L | 576/3828 | SYR4 | 2012–2019 |
| Barium | 32.6 µg/L 1.6% of the EPA limit 2000 µg/L
worst single sample: 251 µg/L | 269/339 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 17.497 µg/L 350% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 19.87 µg/L | 247/3826 | SYR4 | 2012–2019 |
| Lead | 4.8 µg/L 32% of the EPA limit 15 µg/L
worst single sample: 8.37 µg/L | 125/303 | SYR4 | 2012–2019 |
| Copper | 90 µg/L 6.9% of the EPA limit 1300 µg/L
worst single sample: 330 µg/L | 106/331 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 1.42 µg/L 28% of the EPA limit 5 µg/L
worst single sample: 3 µg/L | 69/3828 | SYR4 | 2012–2019 |
| Benzene | 12.538 µg/L 251% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 12.92 µg/L | 37/3829 | SYR4 | 2012–2019 |
| Ethylene Dibromide | 0.0400 µg/L 80% of the EPA limit 0.0500 µg/L
worst single sample: 0.0540 µg/L | 36/846 | SYR4 | 2012–2019 |
| Chromium | 3 µg/L 3% of the EPA limit 100 µg/L
worst single sample: 26 µg/L | 27/356 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 4.794 pCi/L No EPA limit set
worst single sample: 6.4 pCi/L | 27/27 | SYR4 | 2012–2018 |
| Combined Radium (-226 And -228) | 3.272 pCi/L 65% of the EPA limit 5 pCi/L
worst single sample: 3.38 pCi/L | 19/40 | SYR4 | 2012–2018 |
| Arsenic | 4.51 µg/L 45% of the EPA limit 10 µg/L
worst single sample: 5 µg/L | 15/397 | SYR4 | 2012–2019 |
| Combined Uranium | 4.211 µg/L 14% of the EPA limit 30 µg/L
worst single sample: 5.17 µg/L | 15/27 | SYR4 | 2012–2018 |
| 1,2-Dichloropropane | 0.8445 µg/L 17% of the EPA limit 5 µg/L
worst single sample: 0.8900 µg/L | 14/3829 | SYR4 | 2012–2019 |
| Bromoform | 2.52 µg/L No EPA limit set
worst single sample: 3.3 µg/L | 14/1014 | SYR4 | 2012–2019 |
| Dibromochloromethane | 3.1 µg/L No EPA limit set
worst single sample: 3.7 µg/L | 13/1016 | SYR4 | 2012–2019 |
| Chloroform | 9.28 µg/L No EPA limit set
worst single sample: 15.4 µg/L | 10/1014 | SYR4 | 2012–2019 |
| Selenium | 3.64 µg/L 7.3% of the EPA limit 50 µg/L
worst single sample: 4 µg/L | 10/356 | SYR4 | 2012–2019 |
| trans-1,2-Dichloroethylene | 1.2055 µg/L 1.2% of the EPA limit 100 µg/L
worst single sample: 1.21 µg/L | 10/3830 | SYR4 | 2012–2019 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L | 9/9 | LCR | 2023 |
| Thallium, Total | 2.88 µg/L 144% of the EPA limit, at the 95th percentile of samples — 2 µg/L
worst single sample: 3.2 µg/L | 9/367 | SYR4 | 2012–2019 |
| 1,1,2-Trichloroethane | 6.77 µg/L 135% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 8.6 µg/L | 7/3829 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 6.144 pCi/L 41% of the EPA limit 15 pCi/L
worst single sample: 6.36 pCi/L | 7/24 | SYR4 | 2012–2018 |
| Antimony, Total | 1.45 µg/L 24% of the EPA limit 6 µg/L
worst single sample: 1.6 µg/L | 6/356 | SYR4 | 2012–2019 |
| TTHM | 3.875 µg/L 4.8% of the EPA limit 80 µg/L
worst single sample: 4 µg/L | 6/460 | SYR4 | 2012–2019 |
| Beryllium, Total | 0.9220 µg/L 23% of the EPA limit 4 µg/L
worst single sample: 1 µg/L | 5/356 | SYR4 | 2012–2019 |
| Bromodichloromethane | 3.916 µg/L No EPA limit set
worst single sample: 4.7 µg/L | 5/1016 | SYR4 | 2012–2019 |
| Cadmium | 0.1000 µg/L 2% of the EPA limit 5 µg/L | 5/356 | SYR4 | 2012–2019 |
| Vinyl Chloride | 1.578 µg/L 79% of the EPA limit 2 µg/L
worst single sample: 1.74 µg/L | 5/3830 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.67 µg/L No EPA limit set
worst single sample: 1.7 µg/L | 3/60 | SYR4 | 2013–2018 |
| Mercury | 1.82 µg/L 91% of the EPA limit 2 µg/L
worst single sample: 2 µg/L | 3/356 | SYR4 | 2012–2019 |
| Toluene | 1.504 µg/L 0.2% of the EPA limit 1000 µg/L
worst single sample: 1.56 µg/L | 3/3830 | SYR4 | 2012–2019 |
| Ethylbenzene | 0.9765 µg/L 0.1% of the EPA limit 700 µg/L
worst single sample: 0.9800 µg/L | 2/3829 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 1.685 µg/L 2.8% of the EPA limit 60 µg/L
worst single sample: 1.7 µg/L | 2/24 | SYR4 | 2017–2018 |
| Di(2-ethylhexyl) Phthalate | 0.6400 µg/L 11% of the EPA limit 6 µg/L | 1/151 | SYR4 | 2012–2019 |
| Styrene | 1.17 µg/L 1.2% of the EPA limit 100 µg/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
Utility contact
Frequently asked questions about Town of Hempstead Water Department
Is Town of Hempstead Water Department tap water safe to drink?
EPA monitoring detected 43 contaminants in Town of Hempstead Water Department's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Town of Hempstead Water Department's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Tetrachloroethylene, cis-1,2-Dichloroethylene, 1,1-Dichloroethylene, and others. The full list with the level and data source for each is above.
How many people does Town of Hempstead Water Department serve?
Town of Hempstead Water Department reports serving 110,000 people in New York, per its EPA record.
Has Town of Hempstead Water Department had any water quality violations?
The EPA has no formal drinking-water violations on file for Town of Hempstead Water Department.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.