Public water system record
Warwick Water Works
Serves an area of Chester County, PA · 98 people served
Federal records show 4 health-based violations and 13 monitoring/reporting issues for Warwick Water Works in the last ten years. The most serious issue in this window was a resolved Revised Total Coliform Rule violation.
System profile
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 13
Key facts
- Warwick Water Works draws water from 4 wells.
- Most recent formal enforcement: consent decree or court judgment by Pennsylvania, January 2005.
- Record on file since 1984, with 5 health-based violations before October 20, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 46 service lines.
Check whether Warwick Water Works 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 |
|---|---|---|---|---|
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Nov 6, 2019 | Resolved | No |
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Nov 5, 2019 | Resolved | No |
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Oct 9, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Sep 1, 2019 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Groundwater Rule
Monitoring and reporting
|
Nov 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Groundwater Rule
Monitoring and reporting
|
May 1, 2025 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Dec 1, 2024 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Sep 1, 2024 | Resolved |
|
Nickel
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
May 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Dec 17, 2019 | Resolved |
|
Public Notice
OTHER
|
Dec 16, 2019 | Resolved |
|
Public Notice
OTHER
|
Nov 19, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Nov 6, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Nov 5, 2019 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Oct 9, 2019 | Resolved |
Full record since 1984
EPA's records for Warwick Water Works go back to 1984. Before October 20, 2016 they list 5 health-based violations (4 resolved, 1 archived by EPA without a recorded fix) and 72 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 21 |
| 1990s | 3 | 11 |
| 2000s | 0 | 9 |
| 2010 to October 19, 2016 | 1 | 31 |
| October 20, 2016 to 2019 | 4 | 6 |
| 2020s | 0 | 7 |
Most recent health-based violation before October 20, 2016: Groundwater Rule, began January 2015, Resolved.
Show all 5 health-based violations before October 20, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
Jan 1, 2015 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1998 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Mar 21, 1997 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1995 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jul 1, 1988 | Archived |
Enforcement actions
Pennsylvania regulators and EPA took 3 formal enforcement actions against Warwick Water Works between 1993 and 2005. The most recent was a consent decree or court judgment in January 2005.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 13, 2005 | Pennsylvania | Consent decree or court judgment | 1 violation: Lead and Copper Rule |
| Nov 2, 2004 | Pennsylvania | Consent decree or court judgment | 1 violation: Consumer Confidence Rule |
| Nov 5, 1993 | EPA | Compliance order (no penalty) | 25 violations (1 health-based): Endrin, BHC-GAMMA, Methoxychlor, Toxaphene, 2,4-D |
What the violations mean
Revised Total Coliform Rule
3 incidentsThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
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
Warwick Water Works draws water from 4 wells.
Annual water quality report
Warwick Water Works 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 Warwick Water Works 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 Pennsylvania.
Certified drinking water labs by state EPA guidance for private wells