Is Duncansville, PA Tap Water Safe to Drink?
Graded D, with 18 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
48/100
waterverge.com Duncansville, PA — Water Quality Report
Duncansville's drinking water received a grade of D (48 out of 100), indicating poor water quality. The city's 3 water systems serve approximately 4,944 residents using purchased surface water.
Lead levels were measured at 1.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 194 violations on record, including 5 health-based violations. 18 remain unresolved.
What to know about Duncansville's water
Duncansville ranks #348 out of 560 cities in Pennsylvania for water quality, placing it below average 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.
The system has seen 36 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Duncansville, PA water safe to drink?
Duncansville's drinking water has significant quality concerns based on EPA testing data. With a grade of D (48/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 4,944 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Duncansville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Duncansville's water quality assessment. Grade: D (48/100).
Contaminants: Public Notice.
Contaminants: Public Notice.
Contaminants: Endothall, Glyphosate, Hexachlorocyclopentadiene.
Federal disaster declaration (FEMA DR-3356). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3340). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Duncansville's water supply.
Well within EPA limits.
Violation history
Duncansville's water system has 194 total violations on record, including 5 health-based violations. 18 remain unresolved. 36 violations were issued in the last 5 years.
Flood & environmental risk
Blair County has experienced 9 federally declared disasters since 1972. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Duncansville's water come from?
Duncansville's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 3 water systems serving approximately 4,944 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Duncansville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Duncansville'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.
Duncansville'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 ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Duncansville
Industrial polluters nearby
Reported releases to surface water by facilities near Duncansville, ranked by pounds discharged annually.
Total reported releases to surface water: 50 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
ST PRODUCTS LLC (DBA WIELAND SMALL TUBE PRODUCTS) DUNCANSVILLE, PA16635 | Copper | 46 | 0.9 mi |
ALPHA ASSEMBLY SOLUTIONS ALTOONA, PA16602 | Lead compounds | 4 | 4.2 mi |
AMERWAY INC ALTOONA, PA16601 | — | — | 4.4 mi |
SYNTHEX ORGANICS LLC ALTOONA, PA16601 | — | — | 4.0 mi |
VEEDER-ROOT CO DUNCANSVILLE, PA16635 | — | — | 1.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Duncansville
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.
- DELTA QUARRIES DISPOSAL INC STOTLER LANDFILL9.7 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Blair County has experienced 9 federally declared disasters since 1972. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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. | 1.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Duncansville compares by contaminant
Explore where Duncansville ranks among all Pennsylvania cities for specific contaminants.
Water source & infrastructure
Where Duncansville's water comes from
Duncansville'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 local government ownership and serves approximately 4,944 people through 3 water systems.
Water systems serving Duncansville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| BLAIR TWP WATER & SEWER AUTH | PA4070011 | 2,550 | SWP |
| DUNCANSVILLE MUNI WATER AUTH | PA4070012 | 2,350 | GW |
| BEL AIR PARK APTS | PA4070060 | 44 | GW |
How Duncansville compares
Full Pennsylvania rankings →Duncansville's score of 48/100 is on par with the average of 49/100 among major Pennsylvania cities. It outscores 8 of 10 nearby cities.
Nearby cities
View Pennsylvania rankings →About Duncansville, PA
Learn more about your water
Guides and resources related to Duncansville's water quality findings.
Explore water quality across Blair
Frequently asked questions
Is Duncansville, PA tap water safe to drink?
Duncansville's water quality earned a grade of D (48/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #348 out of 560 cities tested in Pennsylvania.
What contaminants are in Duncansville's water?
Lead was measured at 1.0 ppb (90th percentile). 194 violations are on record.
How is Duncansville'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 Duncansville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Duncansville's water come from?
Duncansville's water is sourced from Purchased surface water. The city has 3 water systems serving approximately 4,944 residents.
What health violations has Duncansville's water system had?
Duncansville has 5 health-based violations on record. The most recent violation was recorded in January 2026. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 18 violations remain unresolved.
How does Duncansville's water compare to other cities?
Duncansville ranks #348 out of 560 cities in Pennsylvania (better than 38% of state cities) and #13514 out of 15744 cities nationally (14th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.