Water Quality: Mahopac, NY
18 water systems • 10,190 people served
Multiple Health ViolationsWater Quality Summary
Mahopac is served by 18 public water systems with a combined service population of 10,190 people, and has 128 EPA Safe Drinking Water Act violations on record. Critically, 76 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Mahopac's violation count is 8% above the national average for New York. Contaminants associated with violations include Contaminant 1017, Contaminant 1028, Fecal Coliform.
Contaminants Found
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)
Water Systems Serving Mahopac
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| CARMEL WD 2 | NY3903641 | Surface Water | 5,000 | 0 |
| CARMEL WD 3 | NY3903642 | Groundwater | 1,350 | 8 |
| CARMEL WD 8 | NY3903644 | Surface Water | 1,000 | 7 |
| CARMEL WD 4 | NY3905675 | Groundwater | 450 | 25 |
| CARMEL WD 9 | NY3903648 | Groundwater | 400 | 5 |
| CARMEL WD 14 | NY3905700 | Groundwater | 400 | 3 |
| CARMEL WD 7 | NY3905697 | Groundwater | 300 | 3 |
| CARMEL WD 12 | NY3921719 | Groundwater | 300 | 2 |
| YORKVIEW ESTATES W S INC | NY3903651 | Groundwater | 200 | 4 |
| CARMEL WD 6-SHELL VALLEY | NY3905709 | Groundwater | 200 | 5 |
| CARMEL WD 5 | NY3905698 | Groundwater | 150 | 5 |
| CARPENTER TRAILER PARK | NY3915411 | Groundwater | 100 | 1 |
| WHITE SAIL CONDOMINIUM W.S. | NY3922189 | Groundwater | 85 | 31 |
| WATER CLUB CONDOMINIUMS W.S. | NY3903718 | Groundwater | 75 | 6 |
| SHORE ESTATES OWNERS ASSOC INC | NY3903649 | Surface Water | 60 | 0 |
| MIDDLEBRANCH APTS | NY3903715 | Groundwater | 50 | 12 |
| CARMEL WD 6-TOMAHAWK CREEK | NY3909761 | Groundwater | 50 | 6 |
| LAKE PROPERTIES | NY3902003 | Groundwater | 20 | 5 |
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 New York
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.