Public water system record
Aquarion-Ridgefield Knolls
Serves Lakes West, Western Connecticut Planning Region, CT · 958 people served
Federal records show no health-based violations and 3 monitoring/reporting issues for Aquarion-Ridgefield Knolls in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Aquarion-Ridgefield Knolls draws water from 5 wells.
- Most recent formal enforcement: compliance order with a penalty by Connecticut, June 2004.
- Record on file since 1991, with 18 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 223 unknown out of 240 service lines.
Check whether Aquarion-Ridgefield Knolls 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 |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2015 | Active |
Full record since 1991
EPA's records for Aquarion-Ridgefield Knolls go back to 1991. Before October 19, 2016 they list 18 health-based violations (17 resolved, 1 archived by EPA without a recorded fix) and 44 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 8 | 36 |
| 2000s | 10 | 7 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Lead and Copper Rule, began July 2008, Resolved.
Show all 18 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Treatment technique failure
|
Jul 1, 2008 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Mar 1, 2008 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1999 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1998 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1996 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1995 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jul 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1995 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1995 | Archived |
Enforcement actions
Connecticut regulators took 5 formal enforcement actions against Aquarion-Ridgefield Knolls between 1996 and 2004. The most recent was a compliance order with a penalty in June 2004.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 21, 2004 | Connecticut | Compliance order with a penalty | 1 violation: Lead and Copper Rule |
| Jun 18, 2001 | Connecticut | Administrative penalty | 1 violation: Total Coliform |
| Apr 12, 2001 | Connecticut | Compliance order with a penalty | 1 violation: Total Coliform |
| Oct 17, 1997 | Connecticut | Signed compliance agreement | 1 violation (1 health-based): Lead and Copper Rule |
| Apr 10, 1996 | Connecticut | Compliance order (no penalty) | 1 violation (1 health-based): Lead and Copper Rule |
Where the water comes from
Aquarion-Ridgefield Knolls draws water from 5 wells.
Annual water quality report
Aquarion-Ridgefield Knolls 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