Public water system record
Colchester Commons
Serves an area of Southeastern Connecticut Planning Region, CT · 224 people served
Federal records show 2 health-based violations and 6 monitoring/reporting issues for Colchester Commons in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 1
- Unresolved
- 1
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 6
Key facts
- Colchester Commons draws water from 6 wells.
- Most recent formal enforcement: compliance order (no penalty) by Connecticut, December 2013.
- Record on file since 1991, with 8 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 97 unknown out of 97 service lines.
Check whether Colchester Commons 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Active | No |
|
Revised Total Coliform Rule
Contaminant limit exceeded
|
110 | Oct 1, 2022 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2024 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Active |
|
E. coli
Monitoring and reporting
|
Jul 21, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Mar 10, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2017 | Resolved |
Full record since 1991
EPA's records for Colchester Commons go back to 1991. Before October 19, 2016 they list 8 health-based violations (8 resolved) and 111 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 36 |
| 2000s | 2 | 68 |
| 2010 to October 18, 2016 | 5 | 7 |
| October 19, 2016 to 2019 | 0 | 3 |
| 2020s | 2 | 3 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2012, Resolved.
Show all 8 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2011 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 1991 | Resolved |
Enforcement actions
Connecticut regulators took 7 formal enforcement actions against Colchester Commons between 1995 and 2013. The most recent was a compliance order (no penalty) in December 2013.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 31, 2013 | Connecticut | Compliance order (no penalty) | 5 violations (5 health-based): Total Coliform |
| Feb 19, 2010 | Connecticut | Administrative penalty | 1 violation: Lead and Copper Rule |
| Feb 19, 2010 | Connecticut | Compliance order with a penalty | 1 violation: Lead and Copper Rule |
| Jun 21, 2005 | Connecticut | Compliance order with a penalty | 2 violations: Nitrite, Nitrate |
| Dec 23, 2004 | Connecticut | Compliance order with a penalty | 1 violation: Total Coliform |
| May 11, 2004 | Connecticut | Compliance order with a penalty | 2 violations: Nitrite, Nitrate |
| May 4, 1995 | Connecticut | Compliance order with a penalty | 12 violations: Fluoride, Cadmium, Antimony, Total, Selenium, Beryllium, Total |
What the violations mean
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Where the water comes from
Colchester Commons draws water from 6 wells.
Annual water quality report
Colchester Commons 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.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Colchester Commons for a copy.
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