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Water system · PWSID NH1141020

EMERALD LAKE

HILLSBORO, NH · ~1,300 people served

Check your exact address → HILLSBORO overview
100
Excellent
PurityRadar safety score

PWSID

NH1141020

State

New Hampshire

City

HILLSBORO

Population served

1,300

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

50

Violations on record

2

Unaddressed

31

Health-based

152

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2024. Official EPA record →

Treatment technique · EPA contaminant 0700 health-based began Oct 2020 Unaddressed
Other · EPA contaminant 7500 began Jan 2002 Unaddressed
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2024 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2024 Resolved
Reporting · Lead & Copper Rule began Nov 2021 Resolved
Monitoring · Lead & Copper Rule began Oct 2021 Resolved
Other · EPA contaminant 7500 began Jan 2020 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2020 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2019 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2019 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2019 Resolved
Monitoring & reporting · EPA contaminant 3014 began Sep 2016 Resolved

Recent enforcement actions

  • State action · SOX Dec 2024
  • State action · SOX Dec 2024
  • State action · SIF Nov 2024
  • State action · SIF Nov 2024
  • State action · SIA Oct 2024
  • State action · SIE Oct 2024
  • State action · SIE Oct 2024
  • State action · SIA Oct 2024

This profile is built from EPA public records for system NH1141020 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.