Public water system record
Quonnipaug Hills - Main System
Serves an area of South Central Connecticut Planning Region, CT · 564 people served
Federal records show no health-based violations and 97 monitoring/reporting issues for Quonnipaug Hills - Main System in the last ten years.
System profile
Source water
Groundwater
ZIP
06405
EPA system ID
CT0600041
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 97
Key facts
- Quonnipaug Hills - Main System draws water from 6 wells.
- Most recent formal enforcement: signed compliance agreement by Connecticut, August 2012.
- Record on file since 1994, with 9 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 187 service lines.
Check whether Quonnipaug Hills - Main System serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
E. coli
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Mar 10, 2019 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Styrene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Toluene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Benzene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Dinoseb
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Picloram
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Simazine
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Glyphosate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Diquat
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Dalapon
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Endrin
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Chlordane
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Pentachlorophenol
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
2,4,5-TP
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
2,4-D
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
LASSO
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Aldicarb
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Aldicarb sulfone
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Aldicarb sulfoxide
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Fluoride
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Public Notice
OTHER
|
Jul 31, 2004 | Resolved |
Full record since 1994
EPA's records for Quonnipaug Hills - Main System go back to 1994. Before October 19, 2016 they list 9 health-based violations (7 resolved, 2 archived by EPA without a recorded fix) and 10 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 2 |
| 2000s | 5 | 4 |
| 2010 to October 18, 2016 | 4 | 4 |
| October 19, 2016 to 2019 | 0 | 95 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 2011, Resolved.
Show all 9 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 2007 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2006 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2004 | Resolved |
Enforcement actions
Connecticut regulators took 1 formal enforcement action against Quonnipaug Hills - Main System in 2012. The most recent was a signed compliance agreement in August 2012.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 3, 2012 | Connecticut | Signed compliance agreement | 4 violations (4 health-based): Total Coliform |
Where the water comes from
Quonnipaug Hills - Main System draws water from 6 wells.
Annual water quality report
Quonnipaug Hills - Main System must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Connecticut.
Certified drinking water labs by state EPA guidance for private wells