Is Ctwc - Naugatuck Reg-Collinsville Sys Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Private
Counties served: Hartford

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

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Archived	2020-07-01 → 2020-10-01
MR	Monitoring	Resolved	2012-06-01 → 2012-06-30
MR	Monitoring	Resolved	2012-06-01 → 2012-06-30
MR	Monitoring	Resolved	2008-09-01 → 2008-09-30
MR	Monitoring	Resolved	2008-09-01 → 2008-09-30
MR	Monitoring	Resolved	2008-01-01 → 2008-03-31
MR	Monitoring	Resolved	2008-01-01 → 2008-03-31
MR	Monitoring	Resolved	2008-01-01 → 2008-03-31
MR	Monitoring	Resolved	2008-01-01 → 2008-03-31
MR	Monitoring	Resolved	2008-01-01 → 2008-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFOA	0.0049 µg/L	2/6	2023
PFOS	0.0056 µg/L	2/6	2023

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
Copper	163.2 µg/L 13% of the EPA limit 1300 µg/L worst single sample: 180 µg/L	85/100	SYR4	2012–2019
Chloroform	44.725 µg/L No EPA limit set worst single sample: 51 µg/L	72/72	SYR4	2012–2019
Bromodichloromethane	6.95 µg/L No EPA limit set worst single sample: 8.69 µg/L	71/72	SYR4	2012–2019
TTHM	52.637 µg/L 66% of the EPA limit 80 µg/L worst single sample: 57.1 µg/L	60/60	SYR4	2012–2019
Dichloroacetic Acid	12.15 µg/L No EPA limit set worst single sample: 16 µg/L	58/58	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	29.15 µg/L 49% of the EPA limit 60 µg/L worst single sample: 31 µg/L	58/58	SYR4	2012–2019
Trichloroacetic Acid	19 µg/L No EPA limit set worst single sample: 22 µg/L	58/58	SYR4	2012–2019
Dibromochloromethane	0.8415 µg/L No EPA limit set worst single sample: 0.9000 µg/L	34/72	SYR4	2012–2019
Lead	17.5 µg/L 117% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 36 µg/L	34/100	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	28/28	LCR	2025
Nitrate	382.25 µg/L 3.8% of the EPA limit 10000 µg/L worst single sample: 407 µg/L	24/32	SYR4	2012–2019
Barium	12.325 µg/L 0.6% of the EPA limit 2000 µg/L worst single sample: 17 µg/L	12/16	SYR4	2012–2019
Fluoride	182.15 µg/L 4.6% of the EPA limit 4000 µg/L worst single sample: 197 µg/L	12/16	SYR4	2012–2019
Nitrate-Nitrite	316.25 µg/L 3.2% of the EPA limit 10000 µg/L worst single sample: 407 µg/L	12/20	SYR4	2012–2019
Monochloroacetic Acid	0.8700 µg/L No EPA limit set worst single sample: 0.9000 µg/L	4/58	SYR4	2012–2019
Combined Radium (-226 And -228)	1.327 pCi/L 27% of the EPA limit 5 pCi/L	1/2	SYR4	2013–2018

94 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MCDERMOTT, GERALD
Phone: 860-664-6125
Email: [email protected]

Frequently asked questions about Ctwc - Naugatuck Reg-Collinsville Sys

Is Ctwc - Naugatuck Reg-Collinsville Sys tap water safe to drink?

EPA monitoring detected 18 contaminants in Ctwc - Naugatuck Reg-Collinsville Sys'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 Ctwc - Naugatuck Reg-Collinsville Sys's water?

EPA monitoring detected Copper, Chloroform, Bromodichloromethane, TTHM, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Ctwc - Naugatuck Reg-Collinsville Sys serve?

Ctwc - Naugatuck Reg-Collinsville Sys reports serving 6,324 people in Connecticut, per its EPA record.

Has Ctwc - Naugatuck Reg-Collinsville Sys had any water quality violations?

The EPA has 49 violations on file for Ctwc - Naugatuck Reg-Collinsville Sys, 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.