Is Bryn Mawr, PA Tap Water Safe to Drink?
Graded F — but Copper, 1,4-Dioxane and 3 more were detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
34.2/100
waterverge.com Bryn Mawr, PA — Water Quality Report
Bryn Mawr's drinking water received a grade of F (34.2 out of 100), indicating failing water quality. The city's 25 water systems serve approximately 1,057,337 residents using surface water.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. UCMR 5 testing detected 10 PFAS compounds, with levels exceeding EPA maximum contaminant levels in the water supply.
The system has 2066 violations on record, including 36 health-based violations. 58 remain unresolved.
What to know about Bryn Mawr's water
Bryn Mawr ranks #498 out of 560 cities in Pennsylvania for water quality, placing it among the lowest-rated in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
Of particular concern: PFAS "forever chemical" levels exceed the 2024 EPA maximum contaminant levels. These synthetic compounds don't break down naturally and require specialized filtration such as reverse osmosis or granular activated carbon.
Hexavalent chromium (chromium-6) was detected at 2.60 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
As a major metropolitan system serving over 1.1M residents, Bryn Mawr faces large-scale infrastructure challenges including aging pipes and the complexity of treating water across a vast distribution network.
The system has seen 147 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Bryn Mawr, PA water safe to drink?
Bryn Mawr's drinking water has significant quality concerns based on EPA testing data. With a grade of F (34.2/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 25 water systems serve approximately 1,057,337 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Bryn Mawr
A timeline of significant water quality events, violations, and data updates.
PFAS levels exceed EPA maximum contaminant levels. Reverse osmosis or activated carbon filtration recommended.
Latest EPA compliance and testing data incorporated into Bryn Mawr's water quality assessment. Grade: F (34.2/100).
1 health-based. Contaminants: Public Notice, Groundwater Rule.
Contaminants: Chlorite.
1 health-based. Contaminants: Public Notice, Groundwater Rule.
Federal disaster declaration (FEMA DR-4618). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Bryn Mawr's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
PFAS "forever chemicals" exceed EPA maximum contaminant levels. Reverse osmosis or granular activated carbon filtration strongly recommended.
PFAS "forever chemicals" detected
UCMR 5 testing found 10 PFAS compounds in Bryn Mawr's water supply. PFAS are synthetic chemicals that persist indefinitely in the environment and the human body.
Violation history
Bryn Mawr's water system has 2,066 total violations on record, including 36 health-based violations. 58 remain unresolved. 147 violations were issued in the last 5 years.
Flood & environmental risk
Montgomery County has experienced 10 federally declared disasters since 1999. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Valley Creek At Pa Turnpike Br Near Valley Forge, Stony Creek At Sterigere Street At Norristown, Schuylkill River At Norristown, Schuylkill River At Conshohocken, Schuylkill River At Manayunk, Philadelphia.
Where does Bryn Mawr's water come from?
Bryn Mawr's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 25 water systems serving approximately 1,057,337 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Valley Creek At Pa Turnpike Br Near Valley Forge (river), Stony Creek At Sterigere Street At Norristown (river), Schuylkill River At Norristown (river), Schuylkill River At Conshohocken (river), Schuylkill River At Manayunk, Philadelphia (river).
What Bryn Mawr residents can do
Recommended: Reverse osmosis system. This addresses the specific contaminants found in Bryn Mawr's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Bryn Mawr's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Forever chemicals overview
National PFAS report →Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Bryn Mawr
Industrial polluters nearby
Reported releases to surface water by facilities near Bryn Mawr, ranked by pounds discharged annually.
Total reported releases to surface water: 43 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
CLEVELAND-CLIFFS PLATE LLC CONSHOHOCKEN FACILITY CONSHOHOCKEN, PA19428 | Manganese | 33 | 4.8 mi |
COOPERS CREEK CHEMICAL CORP CONSHOHOCKEN, PA19428 | Cresol (mixed isomers) | 7 | 4.2 mi |
PHILADELPHIA ENERGY SOLUTIONS REFINING PHILADELPHIA REFINERY PHILADELPHIA, PA19145 | Xylene (mixed isomers) | 3 | 9.3 mi |
PENN PANEL & BOX CO COLLINGDALE, PA19023 | — | — | 8.0 mi |
CORK INDUSTRIES INC FOLCROFT, PA19032 | — | — | 9.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Bryn Mawr
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- HAVERTOWN PCP2.6 mi
- CRATER RESOURCES INC KEYSTONE COKE CO ALAN WOOD STEEL CO4.4 mi
- STANLEY KESSLER4.8 mi
- HENDERSON ROAD5.0 mi
- TYSONS DUMP6.7 mi
+ 3 more sites
Source: EPA Superfund National Priorities List
Drought conditions
D1 — moderate droughtBucks County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Montgomery County has experienced 10 federally declared disasters since 1999. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Bryn Mawr's water supply, we recommend the following filter types.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 1.38 | 1.3 | mg/L | Inorganic | Over Limit |
| 11Cl-PF3OUdS | ND | HI | µg/L | PFAS | Not Detected |
| 4:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 6:2 FTS 6:2 FTSPFAS A fluorotelomer sulfonate commonly found at sites contaminated with aqueous film-forming foam (AFFF) used in firefighting. Health EffectsPotential liver toxicity and endocrine disruption. Less studied but identified as a contaminant of concern. EPA LimitNo individual MCL (not yet regulated) Common SourcesFirefighting foam (AFFF), airports, military bases, and industrial facilities. | ND | HI | µg/L | PFAS | Not Detected |
| 8:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 9Cl-PF3ONS | ND | HI | µg/L | PFAS | Not Detected |
| ADONA | ND | HI | µg/L | PFAS | Not Detected |
| HFPO-DA HFPO-DA (GenX)PFAS A replacement for PFOA in manufacturing, marketed as safer but still a persistent "forever chemical." Also known as GenX. Health EffectsLiver and kidney effects, reproductive toxicity, immune system effects, and potential cancer risk. EPA Limit10 ppt MCL Common SourcesFluoropolymer manufacturing (used as PFOA replacement), industrial wastewater discharge. | ND | 0.01 | µg/L | PFAS | Not Detected |
| lithium LithiumInorganic A naturally occurring alkali metal found in groundwater. Monitored under UCMR 5 to assess occurrence in drinking water. Health EffectsKidney effects at high doses. Low-level exposure effects under study; some research suggests neurological effects. EPA LimitNo MCL (monitoring only under UCMR 5) Common SourcesNatural mineral deposits, geothermal water, and industrial discharge. | 45.400 | HI | µg/L | PFAS | Detected |
| NEtFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| NFDHA | ND | HI | µg/L | PFAS | Not Detected |
| NMeFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| PFBA PFBAPFAS One of the shortest-chain PFAS compounds. Very mobile in water and difficult to remove with standard filtration. Health EffectsThyroid effects, potential developmental toxicity. Shorter half-life in body than long-chain PFAS. EPA LimitNo individual MCL (not yet regulated) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and firefighting foam. | 0.010 | HI | µg/L | PFAS | Detected |
| PFBS PFBSPFAS A short-chain PFAS used as a replacement for PFOS. While it clears the body faster than long-chain PFAS, it still persists in the environment. Health EffectsThyroid effects, reproductive and developmental toxicity, kidney effects. EPA LimitPart of Hazard Index (1.0) Common SourcesIndustrial discharge, firefighting foam, and as a replacement chemical in manufacturing. | 0.013 | HI | µg/L | PFAS | Detected |
| PFDA | ND | HI | µg/L | PFAS | Not Detected |
| PFDoA | ND | HI | µg/L | PFAS | Not Detected |
| PFEESA | ND | HI | µg/L | PFAS | Not Detected |
| PFHpA PFHpAPFAS A medium-chain PFAS compound found in various environmental samples. Less studied than PFOA/PFOS but still considered a contaminant of concern. Health EffectsLiver effects, potential developmental toxicity, and endocrine disruption. EPA LimitPart of Hazard Index (1.0) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and contaminated water sources. | 0.007 | HI | µg/L | PFAS | Detected |
| PFHpS | ND | HI | µg/L | PFAS | Not Detected |
| PFHxA PFHxAPFAS A short-chain PFAS replacement chemical widely used after manufacturers phased out longer-chain PFAS. Very commonly detected in water. Health EffectsLiver and kidney effects, potential thyroid disruption. Considered less toxic than long-chain PFAS but still persistent. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial processes, firefighting foam (AFFF), food packaging, and textile treatment. | 0.018 | HI | µg/L | PFAS | Detected |
| PFHxS PFHxSPFAS A medium-chain PFAS found in firefighting foam and consumer products. It has a long half-life in the human body, similar to long-chain PFAS. Health EffectsImmune system effects, thyroid disruption, and potential reproductive and developmental harm. EPA LimitPart of Hazard Index (1.0) Common SourcesFirefighting foam (AFFF), waterproof textiles, food packaging, and industrial discharge. | 0.008 | HI | µg/L | PFAS | Detected |
| PFMBA | ND | HI | µg/L | PFAS | Not Detected |
| PFMPA | ND | HI | µg/L | PFAS | Not Detected |
| PFNA PFNAPFAS A long-chain PFAS compound used in manufacturing fluoropolymers. It bioaccumulates in the body and is very persistent in the environment. Health EffectsDevelopmental effects, liver toxicity, immune suppression, and potential cancer risk. EPA LimitPart of Hazard Index (1.0) Common SourcesFluoropolymer manufacturing, industrial emissions, and contaminated water sources. | 0.012 | HI | µg/L | PFAS | Detected |
| PFOA PFOAPFAS A long-chain PFAS ("forever chemical") once widely used in nonstick coatings and firefighting foam. It persists in the body and environment for years. Health EffectsLinked to kidney and testicular cancer, thyroid disease, elevated cholesterol, and reproductive issues. EPA Limit4.0 ppt MCL Common SourcesIndustrial discharge, firefighting foam (AFFF), nonstick cookware manufacturing, and contaminated groundwater. | 0.016 | 0.004 | µg/L | PFAS | Over MCL |
| PFOS PFOSPFAS A long-chain PFAS compound historically used in stain-resistant coatings and firefighting foam. One of the most studied and persistent PFAS chemicals. Health EffectsLiver damage, immune system suppression, thyroid disruption, increased cholesterol, and potential cancer risk. EPA Limit4.0 ppt MCL Common SourcesFirefighting foam (AFFF), industrial sites, stain-resistant fabric treatments, and contaminated groundwater. | 0.021 | 0.004 | µg/L | PFAS | Over MCL |
| PFPeA PFPeAPFAS A short-chain PFAS compound commonly detected in drinking water. One of the most frequently found PFAS in UCMR 5 monitoring. Health EffectsLess studied than PFOA/PFOS. Potential liver and thyroid effects. Research is ongoing. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial discharge, firefighting foam degradation, and consumer products. | 0.022 | HI | µg/L | PFAS | Detected |
| PFPeS | ND | HI | µg/L | PFAS | Not Detected |
| PFTA | ND | HI | µg/L | PFAS | Not Detected |
| PFTrDA | ND | HI | µg/L | PFAS | Not Detected |
| PFUnA | ND | HI | µg/L | PFAS | Not Detected |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Bryn Mawr compares by contaminant
Explore where Bryn Mawr ranks among all Pennsylvania cities for specific contaminants.
Water source & infrastructure
Where Bryn Mawr's water comes from
Bryn Mawr's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by private ownership and serves approximately 1,057,337 people through 25 water systems.
Water bodies near Bryn Mawr
Bryn Mawr is located near 5 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Bryn Mawr
| System Name | PWSID | Population | Source |
|---|---|---|---|
| AQUA PA MAIN SYSTEM | PA1460073 | 822,600 | SW |
| AQUA PA BENSALEM | PA1090078 | 59,001 | SWP |
| AQUA PA WEST CHESTER | PA1150098 | 48,600 | SW |
| AQUA PA UWCHLAN | PA1150035 | 35,518 | SWP |
| AQUA PA BRISTOL | PA1090001 | 28,727 | SW |
| AQUA PA HATBORO | PA1460028 | 12,901 | SWP |
| AQUA PA SUPERIOR MAIN SYSTEM | PA1460085 | 11,400 | SWP |
| AQUA PA FRIENDSHIP | PA1150137 | 8,800 | GW |
| AQUA PA SPRING RUN | PA1150089 | 8,151 | SWP |
| AQUA PA CHALFONT | PA1090005 | 5,900 | GW |
| AQUA PA FLYING HILLS WA SYS | PA3060018 | 5,100 | GW |
| AQUA PA PERKIOMEN TOWNSHIP | PA1460069 | 3,600 | GW |
| AQUA PA HONEYBROOK | PA1150195 | 1,600 | GW |
| AQUA PA PERKIOMEN WOODS | PA1460068 | 1,100 | GW |
| AQUA PA UPPER PROVIDENCE | PA1460015 | 810 | SWP |
| AQUA PA EAST PIKELAND | PA1150006 | 675 | SWP |
| AQUA PA PEDDLERS VIEW | PA1090147 | 600 | GW |
| AQUA PA STONECROFT | PA3060134 | 600 | GW |
| AQUA PA SUPERIOR CENTER POINT | PA1460092 | 500 | GW |
| AQUA PA FRANKLIN | PA1150126 | 265 | GW |
| AQUA PA SUPERIOR MEADOWBROOK | PA3060137 | 250 | GW |
| AQUA PA HILLCREST ESTATES II | PA3060133 | 214 | GW |
| AQUA PA GEIGERTOWN WATER SYS | PA3060030 | 200 | GW |
| AQUA PA SUPERIOR IVY RIDGE | PA1460007 | 150 | GW |
| AQUA PA EAST POINTE | PA3061153 | 75 | GW |
How Bryn Mawr compares
Full Pennsylvania rankings →Bryn Mawr's score of 34.2/100 is below the average of 49/100 among major Pennsylvania cities. It outscores 1 of 10 nearby cities. 9 of 10 nearby cities score higher.
Nearby cities
View Pennsylvania rankings →Compare Bryn Mawr water quality
Head-to-head reports vs other large US cities — grades, lead, PFAS, and Superfund / TRI proximity.
- Bryn Mawr vs Philadelphia, PA
- Bryn Mawr vs Pittsburgh, PA
- Bryn Mawr vs Bayamon, PR
- Bryn Mawr vs Bayamon, PR
- Bryn Mawr vs Tampa, FL
About Bryn Mawr, PA
Wikipedia →Bryn Mawr is a census-designated place (CDP) located in the Delaware County of Pennsylvania, United States. It is located just west of Philadelphia along Lancaster Avenue, also known as U.S. Route 30. As of 2020, the CDP is defined to include sections of Lower Merion Township, Montgomery County, as well as portions of Haverford Township and Radnor Township.
Learn more about your water
Guides and resources related to Bryn Mawr's water quality findings.
Explore water quality across Montgomery
Frequently asked questions
Is Bryn Mawr, PA tap water safe to drink?
Bryn Mawr's water quality earned a grade of F (34.2/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #498 out of 560 cities tested in Pennsylvania.
What contaminants are in Bryn Mawr's water?
Lead was measured at 0.0 ppb (90th percentile). 10 PFAS compounds were detected. 2066 violations are on record.
How is Bryn Mawr's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Bryn Mawr?
PFAS compounds exceed EPA limits — a reverse osmosis or activated carbon filter is recommended.
Where does Bryn Mawr's water come from?
Bryn Mawr's water is sourced from Surface water. The city has 25 water systems serving approximately 1,057,337 residents.
What health violations has Bryn Mawr's water system had?
Bryn Mawr has 36 health-based violations on record. The most recent violation was recorded in October 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 58 violations remain unresolved.
Why does Bryn Mawr have so many PFAS compounds in its water?
10 different PFAS "forever chemical" compounds were detected in Bryn Mawr's water supply during UCMR 5 testing. PFAS contamination often originates from proximity to military installations (AFFF firefighting foam), airports, industrial manufacturing sites, or wastewater treatment facilities. Some levels exceed the 2024 EPA maximum contaminant levels — a reverse osmosis or NSF-certified activated carbon filter is strongly recommended.
How does Bryn Mawr's water compare to other cities?
Bryn Mawr ranks #498 out of 560 cities in Pennsylvania (better than 11% of state cities) and #15572 out of 15744 cities nationally (1th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.