Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
0
health-based violations
22
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MR | Monitoring | Resolved | 2025-12-30 |
| Other | Monitoring | Resolved | 2024-07-01 |
| Other | Monitoring | Resolved | 2024-07-01 |
| MR | Monitoring | Resolved | 2022-12-30 |
| MR | Monitoring | Resolved | 2022-12-30 |
| Other | Monitoring | Resolved | 2022-08-10 |
| Other | Monitoring | Resolved | 2022-08-10 |
| Other | Monitoring | Resolved | 2021-08-10 |
| Other | Monitoring | Resolved | 2021-08-10 |
| Other | Monitoring | Resolved | 2021-07-01 |
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 |
|---|---|---|---|---|
| TTHM | 83.62 µg/L 105% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 118.2 µg/L | 255/255 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 54.69 µg/L 91% of the EPA limit 60 µg/L
worst single sample: 69.8 µg/L | 252/252 | SYR4 | 2012–2019 |
| Copper | 237.5 µg/L 18% of the EPA limit 1300 µg/L
worst single sample: 1280 µg/L | 166/184 | SYR4 | 2012–2019 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L | 91/91 | LCR | 2025 |
| Lead | 15.6 µg/L 104% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 33 µg/L | 88/184 | SYR4 | 2012–2019 |
| Nitrate | 71 µg/L 0.7% of the EPA limit 10000 µg/L
worst single sample: 92 µg/L | 58/64 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 69.5 µg/L 0.7% of the EPA limit 10000 µg/L
worst single sample: 92 µg/L | 47/53 | SYR4 | 2012–2019 |
| Barium | 11.45 µg/L 0.6% of the EPA limit 2000 µg/L
worst single sample: 18 µg/L | 32/32 | SYR4 | 2012–2019 |
| Fluoride | 909 µg/L 23% of the EPA limit 4000 µg/L
worst single sample: 920 µg/L | 32/32 | SYR4 | 2012–2019 |
| Bromodichloromethane | 5.62 µg/L No EPA limit set
worst single sample: 5.9 µg/L | 8/8 | SYR4 | 2012–2019 |
| Chloroform | 34.475 µg/L No EPA limit set
worst single sample: 35.7 µg/L | 8/8 | SYR4 | 2012–2019 |
| Dibromochloromethane | 0.7750 µg/L No EPA limit set
worst single sample: 0.8000 µg/L | 6/8 | SYR4 | 2012–2019 |
| Nitrite | 16.4 µg/L 1.6% of the EPA limit 1000 µg/L
worst single sample: 20 µg/L | 5/32 | SYR4 | 2012–2019 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L | 4/32 | SYR4 | 2012–2019 |
| Cyanide | 50 µg/L 25% of the EPA limit 200 µg/L | 4/32 | SYR4 | 2012–2019 |
| Cadmium | 0.3000 µg/L 6% of the EPA limit 5 µg/L | 4/32 | SYR4 | 2012–2019 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L | 4/32 | SYR4 | 2012–2019 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L | 4/32 | SYR4 | 2012–2019 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L | 4/32 | SYR4 | 2012–2019 |
| 2,4,5-TP | 0.4400 µg/L 0.9% of the EPA limit 50 µg/L | 3/31 | SYR4 | 2012–2019 |
| 2,4-D | 0.2200 µg/L 0.3% of the EPA limit 70 µg/L | 3/31 | SYR4 | 2012–2019 |
| Bhc-Gamma | 0.0440 µg/L 22% of the EPA limit 0.2000 µg/L | 3/31 | SYR4 | 2012–2019 |
| Endrin | 0.0220 µg/L 1.1% of the EPA limit 2 µg/L | 3/31 | SYR4 | 2012–2019 |
| Methoxychlor | 0.2200 µg/L 0.5% of the EPA limit 40 µg/L | 3/31 | SYR4 | 2012–2019 |
| Toxaphene | 2.2 µg/L 73% of the EPA limit 3 µg/L | 3/31 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L | 2/3 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 0.5000 µg/L 0.3% of the EPA limit 200 µg/L | 1/8 | SYR4 | 2012–2019 |
| 1,1,2-Trichloroethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 0.5000 µg/L 7.1% of the EPA limit 7 µg/L | 1/8 | SYR4 | 2012–2019 |
| 1,2,4-Trichlorobenzene | 24.4 µg/L 35% of the EPA limit 70 µg/L | 1/8 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| 1,2-Dichloropropane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| Antimony, Total | 0.8000 µg/L 13% of the EPA limit 6 µg/L | 1/8 | SYR4 | 2012–2019 |
| Asbestos | 0.1700 MFL 2.4% of the EPA limit 7 MFL | 1/1 | SYR4 | 2019 |
| Benzene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| Beryllium, Total | 0.3000 µg/L 7.5% of the EPA limit 4 µg/L | 1/8 | SYR4 | 2012–2019 |
| Bromoform | 0.5000 µg/L No EPA limit set | 1/8 | SYR4 | 2012–2019 |
| Chlorobenzene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L | 1/8 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 2.27 pCi/L 45% of the EPA limit 5 pCi/L | 1/2 | SYR4 | 2012–2015 |
| Combined Uranium | 1.49 µg/L 5% of the EPA limit 30 µg/L | 1/3 | SYR4 | 2012–2019 |
| Dichloromethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| Ethylbenzene | 0.5000 µg/L 0.1% of the EPA limit 700 µg/L | 1/8 | SYR4 | 2012–2019 |
| Styrene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L | 1/8 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| Thallium, Total | 1 µg/L 50% of the EPA limit 2 µg/L | 1/8 | SYR4 | 2012–2019 |
| Toluene | 0.5000 µg/L 0.1% of the EPA limit 1000 µg/L | 1/8 | SYR4 | 2012–2019 |
| Trichloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/8 | SYR4 | 2012–2019 |
| Vinyl Chloride | 0.5000 µg/L 25% of the EPA limit 2 µg/L | 1/8 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 0.5000 µg/L 0.7% of the EPA limit 70 µg/L | 1/8 | SYR4 | 2012–2019 |
| O-Dichlorobenzene | 0.5000 µg/L 0.1% of the EPA limit 600 µg/L | 1/8 | SYR4 | 2012–2019 |
| P-Dichlorobenzene | 0.5000 µg/L 0.7% of the EPA limit 75 µg/L | 1/8 | SYR4 | 2012–2019 |
| trans-1,2-Dichloroethylene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L | 1/8 | SYR4 | 2012–2019 |
52 contaminants tested, none detected
1,2-DIBROMO-3-CHLOROPROPANE11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBenzo(A)PyreneCarbofuranChlordaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineTotal Polychlorinated Biphenyls (PCB)Lithium
Utility contact
Frequently asked questions about Waterbury Water Department
Is Waterbury Water Department tap water safe to drink?
EPA monitoring detected 53 contaminants in Waterbury 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 Waterbury Water Department's water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Copper, Lead, Lead, and others. The full list with the level and data source for each is above.
How many people does Waterbury Water Department serve?
Waterbury Water Department reports serving 107,271 people in Connecticut, per its EPA record.
Has Waterbury Water Department had any water quality violations?
The EPA has 22 violations on file for Waterbury Water Department, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.