Water Quality: Shelton, CT

68 water systems • 698,892 people served

Multiple Health Violations

1690

Total Violations

Health-Based Violations

Water Systems

698,892

Population Served

Water Quality Summary

Shelton is served by 68 public water systems with a combined service population of 698,892 people, and has 1,690 EPA Safe Drinking Water Act violations on record. Critically, 26 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Shelton's violation count is 569% above the national average for Connecticut. Contaminants associated with violations include Bromate, Disinfection Byproducts, E. coli, Fecal Coliform, Gross Alpha.

Contaminants Found

Bromate

Probable human carcinogen that increases the risk of kidney and thyroid cancers.

Common source: Ozonation of bromide-containing water; used as flour improver

EPA limit: 0.010 mg/L (10 ppb)

Disinfection Byproducts

Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.

Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter

E. coli

Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.

Common source: Fecal contamination from humans or animals entering the water supply

EPA limit: Zero (no E. coli permitted in drinking water)

Fecal Coliform

Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.

Common source: Human and animal fecal waste

EPA limit: Zero tolerance (any positive triggers violations)

Gross Alpha

Alpha-emitting radioactive particles increase cancer risk, particularly from bone and other internal cancers.

Common source: Natural uranium and radium in geological formations

EPA limit: 15 pCi/L (excluding radon and uranium)

Water Systems Serving Shelton

System Name	PWSID	Source	Population	Violations
AQUARION-EASTERN FAIRFIELD COUNTY	CT0150011	Surface Water	351,756	298
AQUARION-STAMFORD	CT1350011	Surface Water	119,214	44
AQUARION-GREENWICH	CT0570011	Surface Water	53,297	60
TORRINGTON WATER COMPANY	CT1430011	Surface Water	37,915	5
AQUARION-DARIEN	CT0350011	Surface Water	18,737	2
AQUARION-PLAINVILLE REGIONAL	CT1100011	Groundwater	18,231	15
AQUARION-SIMSBURY REGIONAL	CT1280021	Groundwater	14,691	54
AQUARION-NEW MILFORD REGIONAL	CT0960011	Groundwater	13,331	18
AQUARION-VALLEY	CT1240011	Surface Water	13,080	2
AQUARION-MYSTIC	CT1370011	Surface Water	10,788	70
AQUARION-NEW CANAAN	CT0900011	Surface Water	10,097	6
AQUARION-RIDGEFIELD	CT1180011	Surface Water	7,476	11
AQUARION-NEWTOWN REGIONAL	CT0970011	Groundwater	6,054	2
AQUARION-LITCHFIELD REGIONAL	CT0740011	Surface Water	3,097	6
AQUARION-SALISBURY	CT1220011	Surface Water	1,932	7
AQUARION-NEW HARTFORD	CT0920011	Groundwater	1,872	13
AQUARION-NORTH CANAAN	CT1000011	Groundwater	1,481	7
AQUARION-MARLBOROUGH	CT0798013	Groundwater	1,348	277
AQUARION-WOODBURY	CT1680011	Groundwater	1,209	145
AQUARION-EAST DERBY	CT0378011	Surface Water	1,101	7
AQUARION-RIDGEFIELD KNOLLS	CT1180021	Groundwater	958	10
AQUARION-NORFOLK	CT0980011	Surface Water	913	7
AQUARION-KENT	CT0680011	Groundwater	817	4
AQUARION-BALL POND	CT0910011	Groundwater	629	20
AQUARION-SUFFIELD	CT1390021	Groundwater	595	12
AQUARION-FALLS VILLAGE	CT0210011	Groundwater	488	116
AQUARION-LAKESIDE	CT1300031	Groundwater	455	3
AQUARION-OXFORD TOWNE CENTER	CT1085061	Groundwater	449	4
AQUARION-NEW FAIRFIELD	CT0915221	Groundwater	406	36
AQUARION-MEADOWBROOK	CT0960201	Groundwater	396	5
AQUARION-ARLINGTON ACRES	CT1370071	Groundwater	392	4
AQUARION-PLEASURE VALLEY	CT1041001	Groundwater	328	9
AQUARION-CARMEN HILL	CT0960101	Groundwater	322	9
AQUARION-TIMBER TRAILS	CT1270021	Groundwater	310	5
AQUARION-POSSUM RIDGE	CT0910041	Groundwater	307	3
AQUARION-OAKWOOD ACRES	CT0910031	Groundwater	286	3
AQUARION-FOREST HILLS	CT0960141	Groundwater	265	23
AQUARION-INDIAN SPRING	CT0340191	Groundwater	242	8
AQUARION-JUDEA MAIN	CT1500021	Groundwater	219	4
AQUARION-CLEARVIEW HILLS	CT1668011	Groundwater	215	1
AQUARION-HOLLANDALE ESTATES	CT0340251	Surface Water	200	6
AQUARION-EAST HAMPTON	CT0420011	Groundwater	189	3
AQUARION-DEAN HEIGHTS	CT0960161	Groundwater	162	9
AQUARION-KEN OAKS	CT0340211	Surface Water	152	5
AQUARION-TWIN OAKS	CT0968011	Groundwater	152	4
AQUARION-LEBANON	CT0710021	Groundwater	149	4
AQUARION-INDIAN FIELDS	CT0180131	Groundwater	147	10
AQUARION-TYLER LAKE	CT0550011	Groundwater	142	1
AQUARION-PEARCE MANOR	CT0340081	Surface Water	133	6
AQUARION-HICKORY HILLS	CT0180101	Groundwater	132	31
AQUARION-VALLEY VIEW	CT0780211	Groundwater	131	10
AQUARION-SCODON	CT1180041	Groundwater	130	6
AQUARION-BUTTERNUT	CT0180021	Groundwater	124	3
AQUARION-HAWKSTONE	CT1080011	Surface Water	120	4
AQUARION-BARNUM	CT1189171	Surface Water	120	3
AQUARION-ROLLING RIDGE	CT0340271	Surface Water	115	5
AQUARION-WEST SHORE	CT0819061	Groundwater	100	3
AQUARION-CORNWALL	CT0310011	Groundwater	98	18
AQUARION-FIELDSTONE RIDGE	CT0910021	Groundwater	84	4
AQUARION-QUARRY RIDGE	CT1500341	Groundwater	84	173
AQUARION-LAUREL RIDGE	CT0960221	Groundwater	80	1
AQUARION-BERKSHIRE	CT0090292	Surface Water	75	4
AQUARION-WOODRICH VILLAGE	CT1666011	Groundwater	72	6
AQUARION-JUDEA DEPOT	CT1500091	Groundwater	68	2
AQUARION-MCKEON	CT1189161	Surface Water	67	5
AQUARION-BIRCHES	CT0911091	Groundwater	66	1
AQUARION-INTERLAKEN	CT0911061	Groundwater	64	25
AQUARION-PARK GLEN	CT0969361	Groundwater	37	3

Concerned About Your Water?

A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.

Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.

Other Cities in Connecticut

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Data Sources

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.

Verify at epa.gov • Search ECHO for CT