Water Quality in Bryn Mawr, PA: 9 Violations — Grade C
Grade C · Score 59/100 · 5 water systems · Updated 2026-05-03
Bryn Mawr's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
EPA monitoring has flagged 9 reportable events for water systems in Bryn Mawr, PA.
Water Quality by ZIP Code in Bryn Mawr
Water quality varies across Bryn Mawr's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 19010 | C | 59 | 9 | 1 | View report → |
Water Quality Overview
Bryn Mawr, Pennsylvania receives a water quality grade of C with an overall score of 59 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 5 water systems serving Bryn Mawr have accumulated 9 EPA violations, including 1 health-based violation. These violations are tracked across 1 ZIP codes serving approximately 994,446 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Bryn Mawr's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Bryn Mawr water systems is 0.0034 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 84% of homes built before 1986, Bryn Mawr has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Radon Risk
Bryn Mawr is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Bryn Mawr
Bryn Mawr is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 994,446 people across 1 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Bryn Mawr. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Bryn Mawr
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Bryn Mawr Water Systems
The following contaminants have been detected or caused violations across Bryn Mawr's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| E. coli | Microbiological | N/A | 1 | 1 | No |
| Gross Alpha | Radionuclides | 15 pCi/L | 1 | 1 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 1 | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Bryn Mawr. Recent actions:
| Date | Action Type |
|---|---|
| 2025-11-03 | State Informal Enforcement |
| 2025-10-24 | State Informal Action |
| 2025-05-21 | State Informal Action |
| 2025-05-21 | State Order Extension |
| 2025-04-10 | State Informal Action |
| 2025-04-10 | State Order Extension |
| 2025-03-12 | State Informal Enforcement |
| 2025-03-05 | State Informal Action |
| 2025-01-28 | State Informal Enforcement |
| 2025-01-28 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-11-03.
Bryn Mawr vs. Nearby Pennsylvania Cities
How Bryn Mawr's water quality compares to similar cities in Pennsylvania:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Bryn Mawr | C | 9 | 5 | 994,446 |
| Gladwyne | D | 0 | 1 | 822,600 |
| Haverford | D | 0 | 1 | 822,600 |
| Villanova | D | 0 | 1 | 822,600 |
Common Questions About Bryn Mawr Water
These are the most common questions residents search for about water quality in Bryn Mawr, Pennsylvania:
Is Bryn Mawr water hard or soft? Water hardness varies by source. Bryn Mawr's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Bryn Mawr tap water? Bryn Mawr's water receives a grade of C (59/100). There are 1 health-based violations — consider filtration.
What is the best water filter for Bryn Mawr? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Bryn Mawr vs. Pennsylvania Average
Understanding how Bryn Mawr compares to the broader Pennsylvania average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Bryn Mawr.
ZIP Codes in Bryn Mawr
Bryn Mawr spans 1 ZIP code. The ZIP with the lowest water quality score is 19010. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.