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Non-Transient Non-Community Water System · PWS CT0210012

Housatonic Valley Regional Hs

Operator location Falls Village, Connecticut - smaller served population (≤ 999) at 750 people served; 97 SDWIS violations on record from groundwater sources.

750
People served (this PWS)
97
EPA violations (this PWS)
19
Health-based (this PWS)
Untested
UCMR5 (this PWS)
Follow published updates (RSS)

Housatonic Valley Regional Hs standing, high SDWIS violation third

750 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 20% is middle-third health share (≤ 23%). Population rank #23,331 of 29,740 among systems serving 500+.

The verdict

Housatonic Valley Regional Hs sits in the upper third of the sitemap cohort by violation count (97), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (750; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 20% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.

#23,331 of 29,740
Population · /systems
#127 of 184
Population · CT
97
Total EPA violations on record
20%
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
Non-Transient Non-Community
Owner Type
Local
Connections
2
County
Litchfield
School/Daycare
Yes
MCL Violations
19
Monitoring Violations
73
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 21 2015
Coliform (TCR) MCL 19 1994
Lead and Copper Rule MR 10 2023
cis-1,2-Dichloroethylene MR 2 2006
o-Dichlorobenzene MR 2 2006
p-Dichlorobenzene MR 2 2006
Vinyl chloride MR 2 2006
1,1-Dichloroethylene MR 2 2006
trans-1,2-Dichloroethylene MR 2 2006
1,2-Dichloroethane MR 2 2006
1,1,1-Trichloroethane MR 2 2006
Carbon tetrachloride MR 2 2006
1,2-Dichloropropane MR 2 2006
1,1,2-Trichloroethane MR 2 2006
Toluene MR 2 2006
DICHLOROMETHANE MR 2 2006
1,2,4-Trichlorobenzene MR 2 2006
CHLOROBENZENE MR 2 2006
Ethylbenzene MR 2 2006
Trichloroethylene MR 2 2006
Styrene MR 2 2006
Nickel MR 2 2015
Benzene MR 2 2006
Tetrachloroethylene MR 2 2006
Coliform (TCR) Other 1 1994

Violation Count vs. the National Corpus

Housatonic Valley Regional Hs has 97 recorded EPA violations, 73% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 20% of this system's own violations are health-based (19 of 97), and it ranks #23,331 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)

97 Around the middle fewer violations than 27% 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 Housatonic Valley Regional Hs

EPA SDWIS lists 750 people served and 2 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.

Sources: EPA SDWIS

Nationwide peers

97 violations · 750 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.

4 peers

Cross-state systems with smaller service footprints

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Housatonic Valley Regional Hs

Use this system's EPA-reported record as a starting filter, not a final verdict.

  • See how every tracked system in Connecticut compares on the same EPA violation measures. Connecticut 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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater