Community Water System · PWS VT0005186
Williamstown Water Dept
Operator location Williamstown, Vermont - 45% of 77 violations are health-based (upper-third health share (> 23%)); groundwater source; 985 served per SDWIS.
- 985
- People served (this PWS)
- 77
- EPA violations (this PWS)
- 35
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Williamstown Water Dept standing, high SDWIS violation third
45% of 77 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 45% is upper-third health share (> 23%). Population rank #19,993 of 29,740 among systems serving 500+.
The verdict
Williamstown Water Dept sits in the upper third of the sitemap cohort by violation count (77), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (985; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 45% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #19,993 of 29,740
- Population · /systems
- #91 of 185
- Population · VT
- 77
- Total EPA violations on record
- 45%
- 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
- 378
- County
- Orange
- School/Daycare
- No
- MCL Violations
- 35
- Monitoring Violations
- 34
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 35 | 2007 |
| Coliform (TCR) | MR | 14 | 1993 |
| TTHM | MR | 10 | 2016 |
| Total Haloacetic Acids (HAA5) | MR | 10 | 2016 |
| Consumer Confidence Rule | Other | 4 | 2017 |
Violation Count vs. the National Corpus
Williamstown Water Dept has 77 recorded EPA violations, 67% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 32% carry more. 45% of this system's own violations are health-based (35 of 77), and it ranks #19,993 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)
77 Around the middle fewer violations than 32% 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 Williamstown Water Dept
35 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for VT0005186.
Sources: EPA SDWIS
Nationwide peers
77 violations · 985 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 Williamstown Water Dept
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Vermont compares on the same EPA violation measures. Vermont 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.