Water Quality: Lake Hopatcong, NJ
3 water systems • 13,090 people served
Multiple Health ViolationsWater Quality Summary
Lake Hopatcong is served by 3 public water systems with a combined service population of 13,090 people, and has 303 EPA Safe Drinking Water Act violations on record. Critically, 28 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Lake Hopatcong's violation count is 367% above the national average for New Jersey. Contaminants associated with violations include Disinfection Byproducts, E. coli.
Contaminants Found
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
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)
Water Systems Serving Lake Hopatcong
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| JEFFERSON TWP W U LK HOP | NJ1414011 | Groundwater | 8,500 | 135 |
| JEFFERSON TWP W U MILTON SYS | NJ1414003 | Groundwater | 4,500 | 113 |
| JEFFERSON TWP W VASSAR ROAD | NJ1414016 | Groundwater | 90 | 55 |
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 Jersey
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.