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.
4
health-based violations
30
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 1980-09-30 → 1980-10-29 |
| MCL | Health-based | Archived | 1980-08-31 → 1980-09-30 |
| MCL | Health-based | Archived | 1980-03-31 → 1980-04-30 |
| MCL | Health-based | Archived | 1980-02-21 → 1980-03-20 |
| MR | Monitoring | Resolved | 2024-11-01 → 2024-11-30 |
| MR | Monitoring | Resolved | 2024-11-01 → 2024-11-30 |
| MR | Monitoring | Resolved | 2024-11-01 → 2024-11-30 |
| MR | Monitoring | Resolved | 2024-11-01 → 2024-11-30 |
| MR | Monitoring | Resolved | 2024-11-01 → 2024-11-30 |
| MR | Monitoring | Resolved | 2024-11-01 → 2024-11-30 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
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 |
|---|---|---|---|---|
| Dibromochloromethane | 5.01 µg/L No EPA limit set
worst single sample: 9.2 µg/L | 319/394 | SYR4 | 2012–2019 |
| Chloroform | 34.44 µg/L No EPA limit set
worst single sample: 56 µg/L | 295/394 | SYR4 | 2012–2019 |
| Bromodichloromethane | 10.63 µg/L No EPA limit set
worst single sample: 16.1 µg/L | 278/394 | SYR4 | 2012–2019 |
| TTHM | 48.92 µg/L 61% of the EPA limit 80 µg/L
worst single sample: 72 µg/L | 265/265 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 19.3 µg/L 32% of the EPA limit 60 µg/L
worst single sample: 26 µg/L | 255/265 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 10.045 µg/L No EPA limit set
worst single sample: 14 µg/L | 252/265 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 9 µg/L No EPA limit set
worst single sample: 11.9 µg/L | 228/265 | SYR4 | 2012–2019 |
| Nitrate | 3560 µg/L 36% of the EPA limit 10000 µg/L
worst single sample: 4030 µg/L | 124/124 | SYR4 | 2012–2019 |
| Bromoform | 2.865 µg/L No EPA limit set
worst single sample: 3.9 µg/L | 90/394 | SYR4 | 2012–2019 |
| Copper | 170.5 µg/L 13% of the EPA limit 1300 µg/L
worst single sample: 250 µg/L | 80/80 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 2 µg/L No EPA limit set
worst single sample: 7.6 µg/L | 71/265 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 3532 µg/L 35% of the EPA limit 10000 µg/L
worst single sample: 4030 µg/L | 68/70 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 8 µg/L No EPA limit set
worst single sample: 15 µg/L | 35/265 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 34/34 | LCR | 2025 |
| Trichloroethylene | 2.88 µg/L 58% of the EPA limit 5 µg/L
worst single sample: 3.1 µg/L | 29/130 | SYR4 | 2012–2019 |
| Barium | 336.4 µg/L 17% of the EPA limit 2000 µg/L
worst single sample: 425 µg/L | 27/34 | SYR4 | 2012–2019 |
| Fluoride | 1107 µg/L 28% of the EPA limit 4000 µg/L
worst single sample: 1220 µg/L | 27/34 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 1.35 µg/L 19% of the EPA limit 7 µg/L
worst single sample: 1.5 µg/L | 16/130 | SYR4 | 2012–2019 |
| Lead | 13.25 µg/L 88% of the EPA limit 15 µg/L
worst single sample: 14 µg/L | 16/80 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 0.9900 µg/L 0.5% of the EPA limit 200 µg/L
worst single sample: 1.1 µg/L | 12/130 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 4.044 µg/L No EPA limit set
worst single sample: 6.78 µg/L | 10/265 | SYR4 | 2012–2019 |
| Chromium | 1.095 µg/L 1.1% of the EPA limit 100 µg/L
worst single sample: 1.1 µg/L | 2/34 | SYR4 | 2012–2019 |
| Bromate | 12 µg/L 120% of the EPA limit, at the 95th percentile of samples — 10 µg/L | 1/37 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 5.4 pCi/L No EPA limit set | 1/9 | SYR4 | 2013–2018 |
| Heptachlor Epoxide | 0.0063 µg/L 3.2% of the EPA limit 0.2000 µg/L | 1/38 | SYR4 | 2012–2019 |
| Hexachlorocyclopentadiene | 0.0170 µg/L 0% of the EPA limit 50 µg/L | 1/40 | SYR4 | 2012–2019 |
| Nitrite | 40 µg/L 4% of the EPA limit 1000 µg/L | 1/62 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 1.2 µg/L 24% of the EPA limit 5 µg/L | 1/130 | SYR4 | 2012–2019 |
76 contaminants tested, none detected
1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Manchester Water Department
Is Manchester Water Department tap water safe to drink?
EPA monitoring detected 35 contaminants in Manchester 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 Manchester Water Department's water?
EPA monitoring detected Dibromochloromethane, Chloroform, Bromodichloromethane, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Manchester Water Department serve?
Manchester Water Department reports serving 51,198 people in Connecticut, per its EPA record.
Has Manchester Water Department had any water quality violations?
The EPA has 30 violations on file for Manchester Water Department, of which 4 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.