Is Quonnipaug Hills - Main Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: New Haven

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.

health-based violations

402

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2011-10-01 → 2011-10-31
MCL	Health-based	Resolved	2011-10-01 → 2011-10-31
MCL	Health-based	Resolved	2011-10-01 → 2011-10-31
MCL	Health-based	Resolved	2011-10-01 → 2011-10-31
MCL	Health-based	Resolved	2011-10-01 → 2011-10-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31
MCL	Health-based	Resolved	2011-08-01 → 2011-08-31

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	3464 µg/L 35% of the EPA limit 10000 µg/L worst single sample: 3940 µg/L	38/38	SYR4	2012–2019
Copper	176.45 µg/L 14% of the EPA limit 1300 µg/L worst single sample: 190 µg/L	32/32	SYR4	2012–2019
Lead	6.5 µg/L 43% of the EPA limit 15 µg/L worst single sample: 20 µg/L	19/32	SYR4	2012–2019
Nitrate-Nitrite	3436 µg/L 34% of the EPA limit 10000 µg/L worst single sample: 3940 µg/L	19/19	SYR4	2012–2019
Bromoform	1.74 µg/L No EPA limit set worst single sample: 1.9 µg/L	17/32	SYR4	2012–2019
Dibromochloromethane	2.18 µg/L No EPA limit set worst single sample: 2.5 µg/L	17/32	SYR4	2012–2019
Lead	0.0028 mg/L 19% of the EPA limit 0.0150 mg/L	15/15	LCR	2025
Bromodichloromethane	1.505 µg/L No EPA limit set worst single sample: 1.7 µg/L	14/32	SYR4	2012–2019
Chloroform	2.02 µg/L No EPA limit set worst single sample: 2.2 µg/L	10/32	SYR4	2012–2019
Barium	249.5 µg/L 12% of the EPA limit 2000 µg/L worst single sample: 258 µg/L	6/6	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	5.5675 pCi/L 37% of the EPA limit 15 pCi/L worst single sample: 5.8 pCi/L	6/6	SYR4	2013–2019
TTHM	6.725 µg/L 8.4% of the EPA limit 80 µg/L worst single sample: 7.1 µg/L	6/6	SYR4	2014–2019
Combined Uranium	5.112 µg/L 17% of the EPA limit 30 µg/L worst single sample: 5.24 µg/L	5/6	SYR4	2013–2019
Dibromoacetic Acid	1.285 µg/L No EPA limit set worst single sample: 1.3 µg/L	4/6	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	4.445 µg/L 7.4% of the EPA limit 60 µg/L worst single sample: 5 µg/L	4/6	SYR4	2014–2019
Arsenic	1.07 µg/L 11% of the EPA limit 10 µg/L worst single sample: 1.1 µg/L	2/6	SYR4	2012–2019
Chromium	1.19 µg/L 1.2% of the EPA limit 100 µg/L worst single sample: 1.2 µg/L	2/6	SYR4	2012–2019
Fluoride	215.5 µg/L 5.4% of the EPA limit 4000 µg/L worst single sample: 220 µg/L	2/6	SYR4	2012–2019
Di(2-ethylhexyl) Phthalate	1.9 µg/L 32% of the EPA limit 6 µg/L	1/6	SYR4	2013–2019
Dichloroacetic Acid	1.3 µg/L No EPA limit set	1/6	SYR4	2014–2019
Nitrite	18 µg/L 1.8% of the EPA limit 1000 µg/L	1/19	SYR4	2012–2019
Toluene	5.8 µg/L 0.6% of the EPA limit 1000 µg/L	1/26	SYR4	2012–2019
Trichloroacetic Acid	2.5 µg/L No EPA limit set	1/6	SYR4	2014–2019

57 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: EDWARDS, NICOLE
Phone: 203-415-4316
Email: [email protected]

Frequently asked questions about Quonnipaug Hills - Main

Is Quonnipaug Hills - Main tap water safe to drink?

EPA monitoring detected 23 contaminants in Quonnipaug Hills - Main'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 Quonnipaug Hills - Main's water?

EPA monitoring detected Nitrate, Copper, Lead, Nitrate-Nitrite, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Quonnipaug Hills - Main serve?

Quonnipaug Hills - Main reports serving 564 people in Connecticut, per its EPA record.

Has Quonnipaug Hills - Main had any water quality violations?

The EPA has 402 violations on file for Quonnipaug Hills - Main, of which 37 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.