Is Pittsburgh, PA Tap Water Safe to Drink?
Graded F — but 1,4-Dioxane, NDMA and 1 more were detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
44/100
waterverge.com Pittsburgh, PA — Water Quality Report
Pittsburgh's drinking water received a grade of F (44 out of 100), indicating failing water quality. The city's 16 water systems serve approximately 801,632 residents using surface water.
Lead levels were measured at 1.7 ppb (90th percentile), well within EPA limits. PFAS testing under UCMR 5 found no detectable forever chemicals.
The system has 873 violations on record, including 44 health-based violations. 138 remain unresolved.
What to know about Pittsburgh's water
Pittsburgh ranks #395 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.
Hexavalent chromium (chromium-6) was detected at 0.72 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 802K residents, Pittsburgh faces large-scale infrastructure challenges including aging pipes and the complexity of treating water across a vast distribution network.
The system has seen 151 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Pittsburgh, PA water safe to drink?
Pittsburgh's drinking water has significant quality concerns based on EPA testing data. With a grade of F (44/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 16 water systems serve approximately 801,632 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Pittsburgh
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Pittsburgh's water quality assessment. Grade: F (44/100).
Contaminants: Total Haloacetic Acids (HAA5), TTHM, CARBON, TOTAL.
Contaminants: Revised Total Coliform Rule, Groundwater Rule.
Contaminants: Consumer Confidence Rule, Total Haloacetic Acids (HAA5), TTHM.
Federal disaster declaration (FEMA DR-3356). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3235). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Pittsburgh's water supply.
Well within EPA limits.
Violation history
Pittsburgh's water system has 873 total violations on record, including 44 health-based violations. 138 remain unresolved. 151 violations were issued in the last 5 years.
Flood & environmental risk
Allegheny County has experienced 8 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. Local water sources include Allegheny R At Lock & Dam 2 At Aspinwall, Allegheny R At L&D 2 (Lower Pool) At Aspinwall, Little Pine Creek Near Etna, Pine Creek At Grant Avenue At Etna, Girtys Run Above Grant Avenue At Millvale.
Where does Pittsburgh's water come from?
Pittsburgh's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 16 water systems serving approximately 801,632 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Allegheny R At Lock & Dam 2 At Aspinwall (river), Allegheny R At L&D 2 (Lower Pool) At Aspinwall (river), Little Pine Creek Near Etna (river), Pine Creek At Grant Avenue At Etna (river), Girtys Run Above Grant Avenue At Millvale (river).
What Pittsburgh residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Pittsburgh'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.
Pittsburgh'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 Pittsburgh
Industrial polluters nearby
Reported releases to surface water by facilities near Pittsburgh, ranked by pounds discharged annually.
Total reported releases to surface water: 12,483 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
USS MON VALLEY WORKS - EDGAR THOMSON PLANT BRADDOCK, PA15104 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 10,185 | 6.8 mi |
USS MON VALLEY WORKS - IRVIN PLANT WEST MIFFLIN, PA15122 | Zinc compounds | 1,087 | 7.6 mi |
CALGON CARBON CORP NEVILLE ISLAND PLANT PITTSBURGH, PA15225 | Manganese | 750 | 6.6 mi |
MCCONWAY & TORLEY LLC PLT 1801 PITTSBURGH, PA15201 | Manganese compounds | 426 | 2.8 mi |
NEVILLE CHEMICAL CO PITTSBURGH, PA15225 | Naphthalene | 36 | 7.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Pittsburgh
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.
- BRESLUBE PENN INC9.9 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Allegheny County has experienced 8 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. | 1.7 | 15 | ppb | Inorganic | Safe |
| 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | 0.004 | µg/L | PFAS | Not Detected |
| 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. | ND | 0.004 | µg/L | PFAS | Not Detected |
| 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. | ND | HI | µg/L | PFAS | Not 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)
See how Pittsburgh compares by contaminant
Explore where Pittsburgh ranks among all Pennsylvania cities for specific contaminants.
Water source & infrastructure
Where Pittsburgh's water comes from
Pittsburgh'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 801,632 people through 16 water systems.
Water bodies near Pittsburgh
Pittsburgh 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 Pittsburgh
| System Name | PWSID | Population | Source |
|---|---|---|---|
| PITTSBURGH WATER & SEWER AUTH | PA5020038 | 520,000 | SW |
| WEST VIEW WATER AUTHORITY | PA5020043 | 200,000 | SW |
| PLUM BORO MUNI AUTH | PA5020041 | 27,500 | SWP |
| FOX CHAPEL AUTH | PA5020040 | 18,500 | SWP |
| ROBINSON TWP MUNI AUTH | PA5020045 | 16,354 | SW |
| NEVILLE TWP WATER DEPT | PA5020029 | 6,750 | SWP |
| RESERVE TWP WATER DEPT | PA5020047 | 3,204 | SWP |
| ASPINWALL BORO WATER DEPT | PA5020003 | 3,151 | SWP |
| VA HEALTHCARE SYSTEM HEINZ | PA5020031 | 3,112 | SWP |
| BLAWNOX BORO WATER DEPT | PA5020004 | 2,200 | SWP |
| CARSON TOWERS | PA5020082 | 266 | SWP |
| BELLEVUE MOBILE HOME PARK | MI0040081 | 190 | GW |
| RIVERSBEND MOBILE HOME PARK | MI0040515 | 180 | GW |
| EVERGREEN PLEASANT VALLEY TRAILER PARK | MI0040454 | 94 | GW |
| FAIRFIELD MANOR MHP | PA5650098 | 92 | GW |
| COUNTRYSIDE ESTATES MHP | PA6370005 | 39 | GW |
How Pittsburgh compares
Full Pennsylvania rankings →Pittsburgh's score of 44/100 is on par with the average of 48/100 among major Pennsylvania cities. It outscores 6 of 10 nearby cities.
Nearby cities
View Pennsylvania rankings →Compare Pittsburgh water quality
Head-to-head reports vs other large US cities — grades, lead, PFAS, and Superfund / TRI proximity.
- Pittsburgh vs Philadelphia, PA
- Pittsburgh vs Bryn Mawr, PA
- Pittsburgh vs Guttenberg Town-0903, NJ
- Pittsburgh vs Guttenberg Town-0903, NJ
- Pittsburgh vs Guttenberg Town-0903, NJ
About Pittsburgh, PA
Wikipedia →Pittsburgh is a city in Allegheny County, Pennsylvania, United States, and its county seat. Located in southwestern Pennsylvania where the Allegheny and Monongahela Rivers meet to form the Ohio River, it had a population of 302,971 at the 2020 census, making it the second-most populous city in Pennsylvania. The Pittsburgh metropolitan area has over 2.43 million people, making it the largest in the Ohio Valley and Appalachia, the second-largest in Pennsylvania, and the 28th-largest in the U.S. The greater Pittsburgh–Weirton–Steubenville combined statistical area includes parts of Ohio and West Virginia.
Learn more about your water
Guides and resources related to Pittsburgh's water quality findings.
Explore water quality across Allegheny
Frequently asked questions
Is Pittsburgh, PA tap water safe to drink?
Pittsburgh's water quality earned a grade of F (44/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #395 out of 560 cities tested in Pennsylvania.
What contaminants are in Pittsburgh's water?
Lead was measured at 1.7 ppb (90th percentile). No PFAS compounds were detected. 873 violations are on record.
How is Pittsburgh'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 Pittsburgh?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Pittsburgh's water come from?
Pittsburgh's water is sourced from Surface water. The city has 16 water systems serving approximately 801,632 residents.
What health violations has Pittsburgh's water system had?
Pittsburgh has 44 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. 138 violations remain unresolved.
How does Pittsburgh's water compare to other cities?
Pittsburgh ranks #395 out of 560 cities in Pennsylvania (better than 29% of state cities) and #14427 out of 15744 cities nationally (8th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.