Transient Non-Community Water System · PWS NH0757020
Whaleback Mountain
Operator location Enfield, New Hampshire - smaller served population (≤ 999) at 500 people served; 121 SDWIS violations on record from groundwater sources.
- 500
- People served (this PWS)
- 121
- EPA violations (this PWS)
- 16
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Whaleback Mountain standing, high SDWIS violation third
500 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 13% is middle-third health share (≤ 23%). Population rank #29,299 of 29,740 among systems serving 500+.
The verdict
Whaleback Mountain sits in the upper third of the sitemap cohort by violation count (121), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (500; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 13% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #29,299 of 29,740
- Population · /systems
- #267 of 284
- Population · NH
- 121
- Total EPA violations on record
- 13%
- 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
- Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Grafton
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 64
- Treatment Tech Violations
- 14
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 48 | 2014 |
| Public Notice | Other | 21 | 2014 |
| Revised Total Coliform Rule | RPT | 20 | 2020 |
| Revised Total Coliform Rule | MON | 12 | 2020 |
| Groundwater Rule | TT | 10 | 2014 |
| E. COLI | MR | 4 | 2024 |
| Revised Total Coliform Rule | TT | 4 | 2020 |
| Coliform (TCR) | MCL | 2 | 2013 |
Violation Count vs. the National Corpus
Whaleback Mountain has 121 recorded EPA violations, 77% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 23% carry more. 13% of this system's own violations are health-based (16 of 121), and it ranks #29,299 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)
121 Higher than most more violations than 77% 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
Population served record for Whaleback Mountain
EPA SDWIS lists 500 people served and 1 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
121 violations · 500 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 Whaleback Mountain
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.