B64/100
Mechanicsburg Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 131,726 residents · Pennsylvania
What's In Mechanicsburg's Tap Water?
69
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.006 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – March 31, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – March 31, 2022Rule: Stage 2 DBPREnforcement: 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
PAW GLEN ALSACE DIV
Population Served
24,951
Water Source
Purchased Surface Water
System ID
PA3060088
PA AMER WATER CO LAKE HERITAGE
Population Served
1,648
Water Source
Groundwater
System ID
PA7010035
PA AMERICAN WATER CO WEST
Population Served
105,127
Water Source
Surface Water
System ID
PA7210029
Frequently Asked Questions About Mechanicsburg Water
Is Mechanicsburg tap water safe to drink?
Mechanicsburg, Pennsylvania tap water receives a grade of B (64/100), which is considered good. Out of 70 contaminants tested, 2 exceed EPA maximum contaminant levels (MCLs) and 4 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Mechanicsburg's water?
Of the 70 contaminants tested in Mechanicsburg's water supply, the most notable include PFOS, Copper (90th percentile), PFOA, Lead (90th percentile). 2 contaminant(s) exceed EPA legal limits (MCLs). 4 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Mechanicsburg have any water quality violations?
Yes, Mechanicsburg has 63 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, TT, Other. 5 of these are health-based violations, which are the most serious category.
Do I need a water filter in Mechanicsburg?
Based on EPA data, using a water filter in Mechanicsburg is recommended. 2 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 Mechanicsburg's tap water come from?
Mechanicsburg's drinking water is sourced from purchased surface water and supplied by PAW GLEN ALSACE DIV and 2 other water system(s). The system serves approximately 131,726 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Mechanicsburg'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. Mechanicsburg'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 Mechanicsburg's water compare to other cities in Pennsylvania?
Mechanicsburg's water quality score of 64/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Pennsylvania state page to see how all cities in the state compare.
What should I do if I'm concerned about Mechanicsburg's water quality?
If you have concerns about Mechanicsburg'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 (PAW GLEN ALSACE DIV) 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.