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
178
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| Other | Monitoring | Resolved | 2024-07-01 |
| Other | Monitoring | Resolved | 2024-07-01 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
| MR | Monitoring | Resolved | 2024-04-01 → 2024-06-30 |
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 |
|---|---|---|---|---|
| TTHM | 85.505 µg/L 107% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 103 µg/L | 150/166 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 54.98 µg/L 92% of the EPA limit 60 µg/L
worst single sample: 108 µg/L | 143/154 | SYR4 | 2012–2019 |
| Copper | 157.28 µg/L 12% of the EPA limit 1300 µg/L
worst single sample: 620 µg/L | 105/105 | SYR4 | 2012–2019 |
| Nitrate | 2980 µg/L 30% of the EPA limit 10000 µg/L
worst single sample: 3020 µg/L | 48/48 | SYR4 | 2012–2019 |
| Chloroform | 72.4 µg/L No EPA limit set
worst single sample: 87 µg/L | 47/79 | SYR4 | 2012–2019 |
| Bromodichloromethane | 13.9 µg/L No EPA limit set
worst single sample: 15 µg/L | 42/79 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.1 µg/L No EPA limit set
worst single sample: 2.3 µg/L | 40/79 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 36/36 | LCR | 2026 |
| Lead | 2.2 µg/L 15% of the EPA limit 15 µg/L
worst single sample: 13 µg/L | 33/105 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 18.5 µg/L No EPA limit set
worst single sample: 21 µg/L | 31/32 | SYR4 | 2018–2019 |
| Nitrate-Nitrite | 2850 µg/L 28% of the EPA limit 10000 µg/L
worst single sample: 3020 µg/L | 31/32 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 30 µg/L No EPA limit set
worst single sample: 33 µg/L | 31/32 | SYR4 | 2018–2019 |
| Barium | 318.35 µg/L 16% of the EPA limit 2000 µg/L
worst single sample: 344 µg/L | 20/22 | SYR4 | 2012–2019 |
| Fluoride | 1064 µg/L 27% of the EPA limit 4000 µg/L
worst single sample: 1120 µg/L | 15/22 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 5.625 µg/L No EPA limit set
worst single sample: 5.9 µg/L | 6/32 | SYR4 | 2018–2019 |
| Beryllium, Total | 0.1000 µg/L 2.5% of the EPA limit 4 µg/L | 2/14 | SYR4 | 2012–2019 |
| Bromoform | 1.165 µg/L No EPA limit set
worst single sample: 1.2 µg/L | 2/79 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 0.5000 µg/L 0.3% of the EPA limit 200 µg/L | 1/47 | SYR4 | 2012–2019 |
| 1,1,2-Trichloroethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 0.5000 µg/L 7.1% of the EPA limit 7 µg/L | 1/47 | SYR4 | 2012–2019 |
| 1,2,4-Trichlorobenzene | 0.5000 µg/L 0.7% of the EPA limit 70 µg/L | 1/47 | SYR4 | 2012–2019 |
| 1,2-Dichloroethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| 1,2-Dichloropropane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| Arsenic | 0.6000 µg/L 6% of the EPA limit 10 µg/L | 1/22 | SYR4 | 2012–2019 |
| Benzene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| Chlorobenzene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L | 1/47 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| Dichloromethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| Ethylbenzene | 0.5000 µg/L 0.1% of the EPA limit 700 µg/L | 1/47 | SYR4 | 2012–2019 |
| Nitrite | 3 µg/L 0.3% of the EPA limit 1000 µg/L | 1/24 | SYR4 | 2012–2019 |
| Styrene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L | 1/47 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| Toluene | 0.5000 µg/L 0.1% of the EPA limit 1000 µg/L | 1/47 | SYR4 | 2012–2019 |
| Trichloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/47 | SYR4 | 2012–2019 |
| Vinyl Chloride | 0.5000 µg/L 25% of the EPA limit 2 µg/L | 1/47 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 0.5000 µg/L 0.7% of the EPA limit 70 µg/L | 1/47 | SYR4 | 2012–2019 |
| O-Dichlorobenzene | 0.5000 µg/L 0.1% of the EPA limit 600 µg/L | 1/47 | SYR4 | 2012–2019 |
| P-Dichlorobenzene | 0.5000 µg/L 0.7% of the EPA limit 75 µg/L | 1/47 | SYR4 | 2012–2019 |
| trans-1,2-Dichloroethylene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L | 1/47 | SYR4 | 2012–2019 |
68 contaminants tested, none detected
1,2-DIBROMO-3-CHLOROPROPANE11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzo(A)PyreneCyanideCadmiumCarbofuranChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneXylenes, TotalLithium
Utility contact
Frequently asked questions about Wallingford Water Department
Is Wallingford Water Department tap water safe to drink?
EPA monitoring detected 42 contaminants in Wallingford 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 Wallingford Water Department's water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Copper, Nitrate, Chloroform, and others. The full list with the level and data source for each is above.
How many people does Wallingford Water Department serve?
Wallingford Water Department reports serving 37,267 people in Connecticut, per its EPA record.
Has Wallingford Water Department had any water quality violations?
The EPA has 178 violations on file for Wallingford 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.