PlainWater
Counties → Pennsylvania

Allegheny County, Pennsylvania

Water Systems
69
Population Served
2,014,752
Total Violations
5,241
657 health-based
PFAS Detected
12
of 32 tested

Violation Analysis

89.9%
Systems with Violations
76.0
Avg Violations per System
12.5%
Health-Based Violations

Water Source Types

SW
44 systems (64%)
GW
6 systems (9%)

PFAS Contamination

32
Systems Tested
12
PFAS Detected
37.5%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Allegheny Pennsylvania water systems by violation status, EPA SDWIS records.

No violations on record (6) One or more violations (44)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
PA Amer Water Co-Pittsburgh 686,000 28 Clean
Pittsburgh Water & Sewer Auth 520,000 193 Clean
West View Water Authority 200,000 290 Clean
Wilkinsburg-Penn Jt Water Auth 125,000 155 Clean
Hampton Shaler Water Authority 61,949 74 Clean
Monroeville Municipal Auth 48,500 45 Detected
Oakmont Water Authority 39,901 26 Clean
Moon Twp Muni Auth 38,000 168 Detected
West Cnty Muni Auth-McKeesport 32,644 110 Clean
Plum Boro Muni Auth 27,500 50 Clean
Pittsburgh Intl Airport 26,915 43 Detected
Western Allegheny County Mun A 19,031 101 Detected
Fox Chapel Auth 18,500 21 Clean
Robinson Twp Muni Auth 16,354 199 Clean
Harrison Twp Water Auth 13,411 133 Clean
Findlay Twp Municipal Auth 11,460 128 Clean
Richland Twp Water Authority 10,190 16 Clean
Upmc Presbyterian 8,200 47 Clean
Edgeworth Boro Muni Auth 7,781 23 Clean
Sewickley Boro Water Auth 6,800 214 Detected
Neville Twp Water Dept 6,750 34 Clean
VA Pittsburgh Ud 6,701 10 Clean
Coraopolis Water & Sewer Auth 5,804 97 Detected
Duquesne Water Dept 5,565 136 Clean
Tarentum Boro Water Dept 4,927 152 Clean
Upmc Magee Womens Hospital 4,900 37 Detected
Upmc Shadyside Hillman Campus 4,750 52 Clean
Fawn Frazer Jt Water Auth 4,650 72 Detected
Upmc Montefiore 4,500 36 Clean
Brackenridge Boro Water Dept 3,700 137 Clean
Springdale Boro Water Dept 3,405 249 Detected
Reserve Twp Water Dept 3,204 48 Clean
Harmar Twp Muni Auth 3,200 368 -
Aspinwall Boro Water Dept 3,151 47 -
VA Healthcare System Heinz 3,112 11 -
Upmc Western Psychiatric Inst 2,645 49 -
Allegheny General Hospital 2,595 0 -
Jefferson Hospital 2,470 0 -
Blawnox Boro Water Dept 2,200 176 -
Aleppo Twp Auth 2,200 56 -
East Deer Twp Water Dept 2,000 110 -
Cheswick Boro Water Dept 1,861 119 -
Braddock Boro Water Auth 1,708 65 -
Township of Springdale 1,600 88 -
Oakdale Boro Water Dept 1,459 119 -
Ahn Wexford Hospital 1,072 0 -
Allegheny Valley Hospital 908 0 -
Davids Diner 900 71 -
Virginia Hills PA LLC 843 0 -
Heritage Valley Sewickley 750 0 -

Other Counties in Pennsylvania

Philadelphia County
6 systems · 1,601,175 served · 447 violations
Montgomery County
172 systems · 1,274,688 served · 36,032 violations
Bucks County
299 systems · 599,107 served · 59,577 violations
Lancaster County
434 systems · 406,457 served · 39,193 violations
York County
208 systems · 389,602 served · 25,528 violations
Berks County
493 systems · 382,268 served · 54,767 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Allegheny County? ▼
Allegheny County has 5,241 total drinking water violations across 69 water systems, of which 657 are health-based violations. 89.9% of systems have at least one violation.
How many people get water from Allegheny County systems? ▼
Water systems in Allegheny County serve approximately 2,014,752 people through 69 public water systems.
Has PFAS been detected in Allegheny County water? ▼
Of 32 water systems tested for PFAS in Allegheny County, 12 had PFAS detected (37.5% detection rate).
What types of water sources supply Allegheny County? ▼
Water systems in Allegheny County use SW (44 systems), GW (6 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 12.5% of Allegheny County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.