Public water system record
CTWC - Unionville System
Serves an area of Capitol Planning Region and Naugatuck Valley Planning Region, CT · 14,693 people served
Federal records show 1 health-based violation and 1 monitoring/reporting issue for CTWC - Unionville System in the last ten years. The most serious issue in this window was a resolved Groundwater Rule violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- CTWC - Unionville System draws water from 9 wells (2 of them for emergency, seasonal or other part-time use).
- Most recent formal enforcement: signed compliance agreement by Connecticut, April 1999.
- Record on file since 1991, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 4,963 unknown out of 6,670 service lines.
Check whether CTWC - Unionville 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
140 | Nov 1, 2019 | Resolved | No |
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, 2016 | Resolved |
Full record since 1991
EPA's records for CTWC - Unionville System go back to 1991. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 2 |
| 2000s | 1 | 0 |
| October 19, 2016 to 2019 | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2002, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2002 | Resolved |
Enforcement actions
Connecticut regulators took 1 formal enforcement action against CTWC - Unionville System in 1999. The most recent was a signed compliance agreement in April 1999.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Apr 7, 1999 | Connecticut | Signed compliance agreement | 1 violation: Total Coliform |
What the violations mean
Groundwater Rule
1 incidentThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
CTWC - Unionville System draws water from 9 wells (2 of them for emergency, seasonal or other part-time use). It also buys water from Metropolitan District Commission. 1 other community water system buys water from CTWC - Unionville System. 1 other public water system has an emergency connection to CTWC - Unionville System.
Buys water from
- Metropolitan District Commission Hartford, CT
Community systems that buy water from it
- Metropolitan District Commission Hartford, CT
Annual water quality report
CTWC - Unionville 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.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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