Water Quality in Derry, NH
86 water systems serving 26,396 people
City Overview
Average lead detection across Derry water systems is 163.9 ppb (Elevated). The EPA action level is 15 ppb. 18 systems have triggered action level violations.
Violation Summary
| Total violations on record | 6292 |
| Health-based violations | 1031 |
| Lead action level violations | 18 |
| Open (unresolved) violations | 0 |
Water Systems in Derry
Frequently Asked Questions
Is Derry tap water safe to drink?
Some water systems in Derry have detected elevated lead levels. While municipal treatment meets EPA standards, lead can leach from older home plumbing. Consider using a certified filter if your home was built before 1986.
What is the water quality in Derry, New Hampshire?
Derry has 86 public water systems serving approximately 26,396 people. The average lead level across sampled systems is 163.9 ppb. There are 6292 total violations on record.
Does Derry have lead in the water?
EPA monitoring data shows an average lead detection of 163.9 ppb across Derry's water systems. The EPA action level is 15 ppb. 18 systems have triggered lead action level violations.
How many water utilities serve Derry?
86 public water systems are registered in Derry, New Hampshire with the EPA Safe Drinking Water Information System. Together they serve approximately 26,396 people.