D32/100
Oakdale Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 20,490 residents · Pennsylvania
What's In Oakdale's Tap Water?
69
Contaminants Tested
1
Exceed EPA Limits
2
Above EPA Goals
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.005 µg/L | 0.004 µg/L | Over Limit |
chlorate | 410.00 µg/L | — | Above Goal |
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
6
Violations (last 5yr)
0
Unresolved
2
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: October 18, 2025 – November 13, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 7, 2025 – November 13, 2025Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Maximum contaminant level violation
When: September 7, 2025 – November 13, 2025Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: September 24, 2024 – October 25, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 20, 2024 – October 25, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: August 20, 2024 – October 25, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
WESTERN ALLEGHENY COUNTY MUN A
Population Served
19,031
Water Source
Purchased Surface Water
System ID
PA5020034
OAKDALE BORO WATER DEPT
Population Served
1,459
Water Source
Purchased Surface Water
System ID
PA5020067
Frequently Asked Questions About Oakdale Water
Is Oakdale tap water safe to drink?
Oakdale, Pennsylvania tap water receives a grade of D (32/100), which is considered poor. 1 contaminant(s) exceed EPA maximum contaminant levels and 71 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Oakdale's water?
Of the 69 contaminants tested in Oakdale's water supply, the most notable include PFOS, Lead (90th percentile), chlorate. 1 contaminant(s) exceed EPA legal limits (MCLs). 3 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Oakdale have any water quality violations?
Yes, Oakdale has 71 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, RPT, TT. 12 of these are health-based violations, which are the most serious category.
Do I need a water filter in Oakdale?
Based on EPA data, using a water filter in Oakdale is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Oakdale's tap water come from?
Oakdale's drinking water is sourced from purchased surface water and supplied by WESTERN ALLEGHENY COUNTY MUN A and 1 other water system(s). The system serves approximately 20,490 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Oakdale's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Oakdale's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Oakdale's water compare to other cities in Pennsylvania?
Oakdale's water quality score of 32/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our Pennsylvania state page to see how all cities in the state compare.
What should I do if I'm concerned about Oakdale's water quality?
If you have concerns about Oakdale's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (WESTERN ALLEGHENY COUNTY MUN A) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.