Is Denville Twp.-1408, New Jersey tap water safe?
3 water systems report serving Denville Twp.-1408. Your water depends on which one serves your address. Check your bill if unsure.
D
Denville Twp Water Dept
Serves 15,881 people · Groundwater · Full report →
No health-based violations in the last 5 years; 44 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile above the new 10 ppb action level (LCRI, effective Nov 1, 2027); Lead 90th percentile below the action level (2023).
C
Rockaway Boro Water Dept
Serves 7,066 people · Groundwater · Full report →
No health-based violations in the last 5 years; 2 monitoring/reporting violations; 1 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2026).
C
Mountain Lakes Water DEP
Serves 4,012 people · Groundwater · Full report →
No health-based violations in the last 5 years; 8 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Lead 90th percentile below the action level (2025).