Water Quality: Green Bay, WI
6 water systems • 159,450 people served
Multiple Health ViolationsWater Quality Summary
Green Bay is served by 6 public water systems with a combined service population of 159,450 people, and has 49 EPA Safe Drinking Water Act violations on record. Critically, 6 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Green Bay's violation count is 50% above the national average for Wisconsin. Contaminants associated with violations include Chlorine Dioxide, Stage 2 DBP.
Contaminants Found
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Water Systems Serving Green Bay
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| GREEN BAY WATERWORKS | WI4050356 | Surface Water | 107,369 | 8 |
| HOWARD WATERWORKS | WI4050468 | Surface Water | 21,133 | 14 |
| BELLEVUE WATERWORKS | WI4050459 | Surface Water | 16,715 | 16 |
| ALLOUEZ WATERWORKS | WI4050455 | Surface Water | 14,156 | 4 |
| COTTAGE GLEN CONDOMINIUMS | WI4150000 | Groundwater | 52 | 6 |
| CENTRAL BROWN CO WATER AUTHORITY | WI4360287 | Surface Water | 25 | 1 |
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 Wisconsin
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.