Wilton, CT 06897

2 water systems • 42,060 residents

Poor water quality - filtration recommended

Score: 21/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

Contaminants Detected

349

Violations on Record

Health-Based Violations

Recent Violations

Grade Breakdown

Contaminant Count0 / 25

Violation History3 / 25

Contaminant Severity18 / 25

System Compliance0 / 15

Enforcement History0 / 10

Total Score21%

21 / 100 points

Recommended Water Filters

✓Point-of-Use Carbon Filter (NSF-certified for lead)
✓Reverse Osmosis or Ion Exchange Filter
✓Ultraviolet (UV) Purification
✓Activated Carbon Filter (disinfection byproducts)
✓Whole Home Carbon Filter System

Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Wilton vs CT & National Average

Detected Contaminants

62 contaminants detected across water systems serving this ZIP code

Contaminant	Category
Atrazine	Agricultural
Glyphosate	Agricultural
Simazine	Agricultural
Total Haloacetic Acids (HAA5)	Disinfection Byproduct
TTHM	Disinfection Byproduct
Antimony, Total	Heavy Metal
Arsenic	Heavy Metal
Barium	Heavy Metal
Beryllium, Total	Heavy Metal
Cadmium	Heavy Metal
Chromium	Heavy Metal
Lead and Copper Rule	Heavy Metal
Mercury	Heavy Metal
Nickel	Heavy Metal
Selenium	Heavy Metal
Thallium, Total	Heavy Metal
CYANIDE	Inorganic
Fluoride	Inorganic
Coliform (TCR)	Microorganism
1,1,1-Trichloroethane	Other
1,2-DIBROMO-3-CHLOROPROPANE	Other
2,4-D	Other
2,4,5-TP	Other
Aldicarb	Other
Aldicarb sulfone	Other
Aldicarb sulfoxide	Other
Benzo(a)pyrene	Other
BHC-GAMMA	Other
Carbofuran	Other
CARBON, TOTAL	Other
Chlordane	Other
Consumer Confidence Rule	Other
Dalapon	Other
Di(2-ethylhexyl) adipate	Other
Di(2-ethylhexyl) phthalate	Other
Dinoseb	Other
Diquat	Other
Endrin	Other
ETHYLENE DIBROMIDE	Other
Heptachlor	Other
Heptachlor epoxide	Other
Hexachlorocyclopentadiene	Other
Interim Enhanced Surface Water Treatment Rule	Other
LASSO	Other
Methoxychlor	Other
OXAMYL	Other
Pentachlorophenol	Other
Picloram	Other
Public Notice	Other
Total Polychlorinated Biphenyls (PCB)	Other
Toxaphene	Other
Combined Radium (-226 and -228)	Radiological
Combined Uranium	Radiological
Gross Alpha, Excl. Radon and U	Radiological
1,1-Dichloroethylene	Volatile Organic
1,2-Dichloroethane	Volatile Organic
Benzene	Volatile Organic
Carbon tetrachloride	Volatile Organic
HEXACHLOROBENZENE	Volatile Organic
p-Dichlorobenzene	Volatile Organic
Trichloroethylene	Volatile Organic
Vinyl chloride	Volatile Organic

Water System Information

Systems Serving This ZIP:: SOUTH NORWALK ELECTRIC & WATER, ROCKTREE APARTMENTS
Population Served:: 42,060
Systems With Violations:: 2 of 2
Major Violations:: 282
Enforcement Actions:: 346

Nearby Areas

06883

Weston • 3.4 mi away

10590

South Salem • 6.2 mi away

06880

Westport • 6.7 mi away

06877

Ridgefield • 7.4 mi away

06852

Norwalk • 7.9 mi away

06881

Westport • 7.9 mi away

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.