Non-Transient Non-Community Water System · PWS NH2525010
High Mowing Sch
Operator location Wilton, New Hampshire - 58% of 52 violations are health-based (upper-third health share (> 23%)); groundwater source; 173 served per SDWIS.
- 173
- People served (this PWS)
- 52
- EPA violations (this PWS)
- 30
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
High Mowing Sch standing, mid SDWIS violation third
58% of 52 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 58% is upper-third health share (> 23%).
The verdict
High Mowing Sch lands in the middle third by violation volume (52), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (173; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 58% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 52
- Total EPA violations on record
- 58%
- Health-based (MCL / treatment failure)
- 173
- 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
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 12
- County
- Hillsborough
- School/Daycare
- Yes
- MCL Violations
- 28
- Monitoring Violations
- 9
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Gross Alpha, Excl. Radon and U | MCL | 16 | 2010 |
| Combined Uranium | MCL | 12 | 2010 |
| Public Notice | Other | 8 | 2010 |
| Coliform (TCR) | MR | 5 | 2012 |
| Consumer Confidence Rule | Other | 4 | 2010 |
| Lead and Copper Rule | MR | 4 | 2016 |
| Lead and Copper Rule | TT | 2 | 1994 |
Violation Count vs. the National Corpus
High Mowing Sch has 52 recorded EPA violations, 57% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 42% carry more. 58% of this system's own violations are health-based (30 of 52), 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)
52 Around the middle fewer violations than 42% 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 High Mowing Sch
30 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NH2525010.
Sources: EPA SDWIS
Nationwide peers
52 violations · 173 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with High Mowing Sch
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.