Waterbury, CT Water Quality
Waterbury, CT has 1 public water system serving 107,271 people. The average Water Safety Score is 75/100 (C). No health violations are on record.
Water Systems in Waterbury
Contaminants Detected in Waterbury Water
| Contaminant | Systems Detected | Exceeding MCL |
|---|---|---|
| Combined Filter Effluent | 1 | 0 |
| E. coli | 1 | 0 |
| Total Coliform (TCR) | 1 | 0 |
Frequently Asked Questions
Waterbury has 1 public water system serving 107,271 people. The average Water Safety Score is 75/100. No health violations are currently on record. Check individual systems below for details.
Waterbury water systems have detected 3 contaminants, including Combined Filter Effluent, E. coli, Total Coliform (TCR). No contaminant exceedances above EPA limits are currently recorded.
The Water Safety Score (0-100, grades A through F) weighs health-based violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%). Scores are based on EPA SDWIS data from the last 10 years.
Request your utility's Consumer Confidence Report (CCR), consider an independent water test from a certified lab, and look into NSF-certified water filters for specific contaminants of concern. For lead, run cold water for 30 seconds before drinking.
Water quality data sourced from EPA's Safe Drinking Water Information System. City data aggregates all public water systems serving the municipality.
For this entity, the underlying data on this page comes from the EPA Safe Drinking Water Information System (SDWIS). The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
Every number on this page links back to the EPA Safe Drinking Water Information System (SDWIS); the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. public water systems with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: EPA Ground Water and Drinking Water, 2026.