Aqua Pa Main System
Bryn Mawr, Pennsylvania · PWSID: PA1460073
Bryn Mawr Water Quality Summary
Aqua Pa Main System supplies drinking water to about 822,600 people in Bryn Mawr, Pennsylvania, and draws from surface water (rivers, lakes, or reservoirs), which requires fuller treatment for runoff, sediment, and microbial risk. On the IsWaterSafe scale it earns a failing Water Safety Score of 59 out of 100 (Grade F), a composite of its EPA SDWIS violation and contaminant record.
EPA records show 2 health-based violations for this system plus 1 monitoring violation. A health-based violation means a contaminant exceeded its legal EPA limit, the most serious category in the Safe Drinking Water Act. The system has 40 enforcement actions on file in response.
Across the 13 substances sampled, none exceeded its EPA limit. Gross Alpha sits highest relative to its ceiling, detected at 7.5 pCi/L against an MCL of 15 pCi/L (sampled October 2023) — within the legal limit.
The most recent documented episode is a health-based violation, beginning January 2020 and marked resolved October 2020.
Track Aqua Pa Main System
Subscribe for WaterSafety updates by email. No spam, unsubscribe anytime.
Detected Contaminants
| Contaminant | Detected Level | MCL (Limit) | Status | Sample Date |
|---|---|---|---|---|
| Gross Alpha | 7.5 pCi/L | 15 pCi/L | Within Limit | Oct 1, 2023 |
| E. coli (RTCR) | 0 presence | 0 presence | Within Limit | Nov 13, 2024 |
| Arsenic | 5 ppb | 10 ppb | Within Limit | Jan 1, 2024 |
| Barium | 1000 ppb | 2000 ppb | Within Limit | Jan 1, 2024 |
| Cadmium | 2.5 ppb | 5 ppb | Within Limit | Jan 1, 2024 |
| Chromium | 50 ppb | 100 ppb | Within Limit | Jan 1, 2024 |
| Cyanide | 100 ppb | 200 ppb | Within Limit | Jan 1, 2024 |
| Fluoride | 2000 ppb | 4000 ppb | Within Limit | Jan 1, 2024 |
| Mercury | 1 ppb | 2 ppb | Within Limit | Jan 1, 2024 |
| Selenium | 25 ppb | 50 ppb | Within Limit | Jan 1, 2024 |
| Antimony | 3 ppb | 6 ppb | Within Limit | Jan 1, 2024 |
| Beryllium | 2 ppb | 4 ppb | Within Limit | Jan 1, 2024 |
| Thallium | 1 ppb | 2 ppb | Within Limit | Jan 1, 2024 |
Violation History
Frequently Asked Questions
Aqua Pa Main System has a Water Safety Score of F (59/100). The system serves 822,600 people and has 2 health violations on record. Check the contaminant table above for specific detected substances.
Aqua Pa Main System has 0 contaminant exceedances above EPA health guidelines. See the full contaminant detection table above for all tested substances and their levels relative to legal limits and health guidelines.
The Water Safety Score (0-100, grades A through F) is based on contaminant levels relative to legal limits, health guideline exceedances, violation history, and enforcement actions. Higher scores indicate fewer concerns.
If your water system has violations, request the Consumer Confidence Report from your utility, consider getting an independent water test from a certified lab, and look into certified water filters for specific contaminants of concern. For lead, run cold water for 30 seconds before drinking.
Water quality data sourced from EPA's Safe Drinking Water Information System (SDWIS). Safety scores are calculated based on contaminant levels, violations, and enforcement history. This is not a substitute for your utility's official Consumer Confidence Report.
Source: EPA Ground Water and Drinking Water, 2026.