Community Water System · PWS NH1591010
Monroe Water Dept
Operator location Monroe, New Hampshire - 80% of 81 violations are health-based (upper-third health share (> 23%)); groundwater source; 300 served per SDWIS.
- 300
- People served (this PWS)
- 81
- EPA violations (this PWS)
- 65
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Monroe Water Dept standing, high SDWIS violation third
80% of 81 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 80% is upper-third health share (> 23%).
The verdict
Monroe Water Dept sits in the upper third of the sitemap cohort by violation count (81), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (300; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 80% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 81
- Total EPA violations on record
- 80%
- Health-based (MCL / treatment failure)
- 300
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 168
- County
- Grafton
- School/Daycare
- No
- MCL Violations
- 65
- Monitoring Violations
- 12
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 39 | 2013 |
| Coliform (TCR) | MCL | 26 | 2013 |
| E. COLI | MR | 4 | 2011 |
| Coliform (TCR) | MR | 4 | 1998 |
| Lead and Copper Rule | MR | 2 | 2006 |
| Combined Radium (-226 and -228) | MR | 2 | 2007 |
Violation Count vs. the National Corpus
Monroe Water Dept has 81 recorded EPA violations, 69% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 31% carry more. 80% of this system's own violations are health-based (65 of 81), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
81 Around the middle fewer violations than 31% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Monroe Water Dept
65 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NH1591010.
Sources: EPA SDWIS
Nationwide peers
81 violations · 300 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Monroe Water Dept
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in New Hampshire compares on the same EPA violation measures. New Hampshire systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.