Community Water System · PWS NH0351010
Canaan Water Dept
Operator location Canaan, New Hampshire - 70% of 261 violations are health-based (upper-third health share (> 23%)); surface water source; 684 served per SDWIS.
- 684
- People served (this PWS)
- 261
- EPA violations (this PWS)
- 182
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Canaan Water Dept standing, high SDWIS violation third
70% of 261 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 70% is upper-third health share (> 23%). Population rank #24,675 of 29,740 among systems serving 500+.
The verdict
Canaan Water Dept sits in the upper third of the sitemap cohort by violation count (261), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (684; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 70% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #24,675 of 29,740
- Population · /systems
- #191 of 284
- Population · NH
- 261
- Total EPA violations on record
- 70%
- Health-based (MCL / treatment failure)
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
- 203
- County
- Grafton
- School/Daycare
- No
- MCL Violations
- 164
- Monitoring Violations
- 55
- Treatment Tech Violations
- 18
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 91 | 2010 |
| TTHM | MCL | 73 | 2022 |
| Public Notice | Other | 12 | 2023 |
| Lead and Copper Rule | MR | 12 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 12 | 2024 |
| TTHM | MR | 12 | 2024 |
| Coliform (TCR) | MR | 11 | 2010 |
| Surface Water Treatment Rule | TT | 10 | 2001 |
| Lead and Copper Rule | TT | 8 | 2014 |
| Revised Total Coliform Rule | MON | 8 | 2024 |
| Revised Total Coliform Rule | RPT | 8 | 2024 |
| Consumer Confidence Rule | Other | 2 | 2013 |
Violation Count vs. the National Corpus
Canaan Water Dept has 261 recorded EPA violations, 89% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 11% carry more. 70% of this system's own violations are health-based (182 of 261), and it ranks #24,675 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
261 Higher than most more violations than 89% 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 Canaan Water Dept
182 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NH0351010.
Sources: EPA SDWIS
Nationwide peers
261 violations · 684 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Canaan 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.