Is Ctwc - Shoreline Region-Chester Tap Water Safe? Quality Report

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

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

156

violations on file

still open

Violation	Type	Status	Period
MON	Monitoring	Resolved	2016-11-01 → 2016-11-30
MON	Monitoring	Resolved	2016-11-01 → 2016-11-30
MON	Monitoring	Resolved	2016-11-01 → 2016-11-30
MON	Monitoring	Resolved	2016-11-01 → 2016-11-30
MR	Monitoring	Resolved	2007-07-01 → 2007-09-30
MR	Monitoring	Resolved	2007-07-01 → 2007-09-30
MR	Monitoring	Resolved	2007-07-01 → 2007-09-30
MR	Monitoring	Resolved	2007-07-01 → 2007-09-30
MR	Monitoring	Resolved	2007-07-01 → 2007-09-30
MR	Monitoring	Resolved	2007-07-01 → 2007-09-30

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	2034 µg/L 20% of the EPA limit 10000 µg/L worst single sample: 2510 µg/L	100/154	SYR4	2012–2019
Bromodichloromethane	13.3 µg/L No EPA limit set worst single sample: 16 µg/L	95/100	SYR4	2012–2019
Chloroform	62 µg/L No EPA limit set worst single sample: 75 µg/L	93/100	SYR4	2012–2019
Dibromochloromethane	2.78 µg/L No EPA limit set worst single sample: 3.9 µg/L	93/100	SYR4	2012–2019
TTHM	86.18 µg/L 108% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 90.5 µg/L	85/85	SYR4	2012–2019
Copper	138.5 µg/L 11% of the EPA limit 1300 µg/L worst single sample: 340 µg/L	84/90	SYR4	2012–2019
Trichloroacetic Acid	21 µg/L No EPA limit set worst single sample: 23.3 µg/L	84/84	SYR4	2012–2019
Dichloroacetic Acid	23 µg/L No EPA limit set worst single sample: 28 µg/L	83/84	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	45.9 µg/L 77% of the EPA limit 60 µg/L worst single sample: 52 µg/L	83/84	SYR4	2012–2019
Nitrate-Nitrite	1796.4 µg/L 18% of the EPA limit 10000 µg/L worst single sample: 2510 µg/L	59/84	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	38/38	LCR	2026
Monochloroacetic Acid	8 µg/L No EPA limit set	29/84	SYR4	2012–2019
Lead	43.8 µg/L 292% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 122 µg/L	18/90	SYR4	2012–2019
Barium	613.3 µg/L 31% of the EPA limit 2000 µg/L worst single sample: 2000 µg/L	15/20	SYR4	2012–2019
Fluoride	577 µg/L 14% of the EPA limit 4000 µg/L worst single sample: 670 µg/L	4/21	SYR4	2012–2019
Combined Radium (-226 And -228)	1.09 pCi/L 22% of the EPA limit 5 pCi/L worst single sample: 1.1 pCi/L	3/4	SYR4	2014–2019
Nitrite	9.8 µg/L 1% of the EPA limit 1000 µg/L worst single sample: 10 µg/L	3/77	SYR4	2012–2019
Combined Uranium	2.0805 µg/L 6.9% of the EPA limit 30 µg/L worst single sample: 2.13 µg/L	2/5	SYR4	2014–2019
Bromoform	0.6900 µg/L No EPA limit set	1/100	SYR4	2012–2019
Di(2-ethylhexyl) Phthalate	2.4 µg/L 40% of the EPA limit 6 µg/L	1/11	SYR4	2013–2019
Ethylene Dibromide	0.0200 µg/L 40% of the EPA limit 0.0500 µg/L	1/11	SYR4	2013–2019
Monobromoacetic Acid	2.9 µg/L No EPA limit set	1/84	SYR4	2012–2019
Thallium, Total	1.4 µg/L 70% of the EPA limit 2 µg/L	1/12	SYR4	2012–2019

87 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDinosebDiquatEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneTolueneTotal 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 - Shoreline Region-Chester

Is Ctwc - Shoreline Region-Chester tap water safe to drink?

EPA monitoring detected 23 contaminants in Ctwc - Shoreline Region-Chester'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 - Shoreline Region-Chester's water?

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

How many people does Ctwc - Shoreline Region-Chester serve?

Ctwc - Shoreline Region-Chester reports serving 5,030 people in Connecticut, per its EPA record.

Has Ctwc - Shoreline Region-Chester had any water quality violations?

The EPA has 156 violations on file for Ctwc - Shoreline Region-Chester, 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.