Community Water System · PWS NY1500283
Chesterfield WD
Operator location Keeseville, New York - 68% of 382 violations are health-based (upper-third health share (> 23%)); surface water source; 2,300 served per SDWIS.
- 2,300
- People served (this PWS)
- 382
- EPA violations (this PWS)
- 261
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Chesterfield WD standing, high SDWIS violation third
68% of 382 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 68% is upper-third health share (> 23%). Population rank #12,562 of 29,740 among systems serving 500+.
The verdict
Chesterfield WD sits in the upper third of the sitemap cohort by violation count (382), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,300 (mid served population (≤ 3,309)). Health-based share is 68% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #12,562 of 29,740
- Population · /systems
- #431 of 1,204
- Population · NY
- 382
- Total EPA violations on record
- 68%
- 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
- 1,000
- County
- Essex
- School/Daycare
- No
- MCL Violations
- 243
- Monitoring Violations
- 113
- Treatment Tech Violations
- 18
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 156 | 2018 |
| TTHM | MCL | 87 | 2012 |
| Interim Enhanced Surface Water Treatment Rule | TT | 16 | 2016 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2015 |
| Arsenic | MR | 6 | 2011 |
| Barium | MR | 6 | 2011 |
| Chromium | MR | 6 | 2011 |
| Selenium | MR | 6 | 2011 |
| Mercury | MR | 6 | 2011 |
| Fluoride | MR | 6 | 2011 |
| Cadmium | MR | 6 | 2011 |
| Endrin | MR | 4 | 1994 |
| 2,4-D | MR | 4 | 1994 |
| Methoxychlor | MR | 4 | 1994 |
| TTHM | MR | 4 | 2004 |
| 2,4,5-TP | MR | 4 | 1994 |
| Toxaphene | MR | 4 | 1994 |
| BHC-GAMMA | MR | 4 | 1994 |
| Coliform (TCR) | MR | 3 | 2009 |
| Nickel | MR | 3 | 2011 |
| Antimony, Total | MR | 3 | 2011 |
| Beryllium, Total | MR | 3 | 2011 |
| Nitrate | MR | 3 | 1988 |
| Thallium, Total | MR | 3 | 2011 |
| CYANIDE | MR | 3 | 2011 |
| Surface Water Treatment Rule | TT | 2 | 1993 |
| ETHYLENE DIBROMIDE | MR | 2 | 1994 |
| Aldicarb sulfone | MR | 1 | 1994 |
| Carbofuran | MR | 1 | 1994 |
| Chlordane | MR | 1 | 1994 |
Violation Count vs. the National Corpus
Chesterfield WD has 382 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 68% of this system's own violations are health-based (261 of 382), and it ranks #12,562 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)
382 Higher than most more violations than 93% 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 Chesterfield WD
261 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NY1500283.
Sources: EPA SDWIS · New York State Department of Health, Public Water Systems
Nationwide peers
382 violations · 2,300 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.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Chesterfield WD
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in New York compares on the same EPA violation measures. New York 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.