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Safety Grade
We compute an overall water quality grade based on violations and health risks, not just legal compliance.
Health Context
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Violation History
See every time your water exceeded legal limits or missed required testing, up to 10 years back.
Recommendations
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About this data: ClearWater uses the EPA's Safe Drinking Water Information System (SDWIS). Data is for public water systems only; private wells are not included. Legal limits (MCLs) are minimum standards; some contaminants may still pose health risks below legal thresholds.
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Water systems near
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ROCK RIMMON COOPERATIVE
EAST HAMPSTEAD, NH · 200 people served · Groundwater
Data last updated: 2026-07-12
49 total violations on record. No currently active health-based violations.
Health-Based Violations
- Combined Radium (-226 and -228): Maximum Contaminant Level Violation (Resolved) — State Compliance achieved (State) on 2017-01-05
- Combined Radium (-226 and -228): Maximum Contaminant Level Violation (Resolved) — State Compliance achieved (State) on 2017-01-05
- Combined Radium (-226 and -228): Maximum Contaminant Level Violation (Resolved) — State Compliance achieved (State) on 2017-01-05
- Arsenic: Maximum Contaminant Level Violation (Resolved) — State Compliance achieved (State) on 2017-01-05
- Combined Radium (-226 and -228): Maximum Contaminant Level Violation (Resolved) — State Compliance achieved (State) on 2017-01-05
- Arsenic: Maximum Contaminant Level Violation (Resolved) — State Compliance achieved (State) on 2017-01-05
Lead & Copper
EPA has no lead or copper 90th-percentile results on record for this system.
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ROCK RIMMON COOPERATIVE: Frequently Asked Questions
Is ROCK RIMMON COOPERATIVE water safe to drink?
ROCK RIMMON COOPERATIVE has had multiple health-based violations in recent years (grade C). Review the specific violations below and consider filtering your drinking water.
What violations has ROCK RIMMON COOPERATIVE had?
Recent health-based violations at ROCK RIMMON COOPERATIVE include: Combined Radium (-226 and -228), Combined Radium (-226 and -228), Combined Radium (-226 and -228). See the full violation history on this page for dates, status, and details.
Does ROCK RIMMON COOPERATIVE water have lead?
Lead in drinking water typically comes from household plumbing, not from ROCK RIMMON COOPERATIVE's treatment plant. See the Lead & Copper section on this page for the most recent 90th-percentile lead test results. If your home was built before 1986, consider running cold water for 30 seconds before drinking and using an NSF/ANSI 53-certified filter.
Related water quality pages
Lead & Copper
What To Do
Violations
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