Public water system record
East Deer Twp Water Dept
Serves an area of Allegheny County, PA · 2,000 people served
Federal records show 3 health-based violations and 10 monitoring/reporting issues for East Deer Twp Water Dept in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 3
- Resolved
- 2
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 10
Key facts
- East Deer Twp Water Dept buys its water from Tarentum Boro Water Dept.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2025.
- Most recent formal enforcement: consent decree or court judgment by Pennsylvania, August 2005.
- Record on file since 1993, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 370 unknown out of 605 service lines.
Check whether East Deer Twp Water Dept 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 |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Apr 1, 2025 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2025 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2025 | Resolved |
|
Public Notice
OTHER
|
May 11, 2025 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2017 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
Full record since 1993
EPA's records for East Deer Twp Water Dept go back to 1993. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 27 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 2 |
| 2000s | 3 | 5 |
| 2010 to October 18, 2016 | 0 | 20 |
| October 19, 2016 to 2019 | 0 | 5 |
| 2020s | 3 | 5 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2006, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082375 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Apr 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jan 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Oct 1, 2005 | Resolved |
Enforcement actions
Pennsylvania regulators took 1 formal enforcement action against East Deer Twp Water Dept in 2005. The most recent was a consent decree or court judgment in August 2005.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 8, 2005 | Pennsylvania | Consent decree or court judgment | 2 violations: Chlorine, Surface Water Treatment Rule |
What the violations mean
Total Trihalomethanes (TTHMs)
3 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
East Deer Twp Water Dept buys its water from Tarentum Boro Water Dept. It lists no wells or intakes of its own.
Buys water from
- Tarentum Boro Water Dept Tarentum, PA
Annual water quality report
East Deer Twp Water Dept 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 Pennsylvania.
Certified drinking water labs by state EPA guidance for private wells