Transient Non-Community Water System · PWS NY4317684
Lake Welch + Sebago Beach W.S.
Operator location Bear Mountain, New York - larger served population (> 3,309) at 15,000 people served; 51 SDWIS violations on record from surface water sources.
- 15,000
- People served (this PWS)
- 51
- EPA violations (this PWS)
- 9
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lake Welch + Sebago Beach W.S. standing, mid SDWIS violation third
15,000 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 18% is middle-third health share (≤ 23%). Population rank #3,461 of 29,740 among systems serving 500+.
The verdict
Lake Welch + Sebago Beach W.S. lands in the middle third by violation volume (51), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (15,000; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 18% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #3,461 of 29,740
- Population · /systems
- #123 of 1,204
- Population · NY
- 51
- Total EPA violations on record
- 18%
- 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
- State
- Connections
- 15
- County
- Rockland
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 13
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 7 | 2002 |
| Surface Water Treatment Rule | MR | 6 | 2001 |
| Coliform (TCR) | MR | 5 | 2015 |
| Interim Enhanced Surface Water Treatment Rule | TT | 2 | 2005 |
| Revised Total Coliform Rule | MON | 2 | 2017 |
Violation Count vs. the National Corpus
Lake Welch + Sebago Beach W.S. has 51 recorded EPA violations, 57% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 43% carry more. 18% of this system's own violations are health-based (9 of 51), and it ranks #3,461 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)
51 Around the middle fewer violations than 43% 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 Lake Welch + Sebago Beach W.S.
EPA SDWIS lists 15,000 people served and 15 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · New York State Department of Health, Public Water Systems
Nationwide peers
51 violations · 15,000 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.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Lake Welch + Sebago Beach W.S.
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.