How does Penn Hills's water compare to the national average?

The USA national average is 151 mg/L. Penn Hills (≈ 120–179 mg/L) is 1 mg/L softer than average.

Penn Hills Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.6

neutral = 7.0

Lead

0.006 mg/L

✓ Below action level

TDS

140 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In Penn Hills, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Penn Hills	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How Penn Hills compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Penn Hills, Pennsylvania	≈ 120–179 mg/L	8.5 ppt	🟠 Hard	reservoir
Wilkinsburg, Pennsylvania	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Plum, Pennsylvania	≈ 180+ mg/L	4.7 ppt	🔴 Very Hard	reservoir
Monroeville, Pennsylvania	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Lower Burrell, Pennsylvania	≈ 120–179 mg/L	5.3 ppt	🟠 Hard	reservoir

National Benchmark

How Penn Hills compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Penn Hills	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Penn Hills's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 140 mg/LpH: 7.6

The Wilkinsburg-Penn Joint Water Authority (WPJWA) supplies drinking water to Penn Hills and surrounding areas in Allegheny County, Pennsylvania, serving approximately 120,000 residents. Water is sourced from the Allegheny River at the Nadine Intake on Allegheny River Boulevard in Penn Hills. The authority operates treatment facilities that process raw river water through coagulation, sedimentation, filtration, and chlorination to meet EPA and PA DEP standards, conducting daily testing for over 100 chemical and microbial parameters. Contact: 2200 Robinson Boulevard, Pittsburgh, PA 15221.

The Allegheny River watershed spans over 11,400 square miles across Pennsylvania, New York, and Ohio, with the Penn Hills intake drawing from the middle river section. Underlying geology features Paleozoic sedimentary formations — including Devonian and Carboniferous shales, sandstones, and limestones such as the Pocono Formation and Catskill Group — rich in carbonates. Natural weathering through the Appalachian Plateau terrain leaches dissolved calcium and magnesium into the river, imparting a hard supply character to the treated water.

Hard water in Penn Hills causes noticeable scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Lime deposits form on faucets and fixtures, and soap lathering is less effective, requiring more detergent. Regular vinegar-based cleaning mitigates buildup; a water softener is recommended for households with persistent issues. Recent PFAS sampling began in 2023 with no detections above standards; disinfection byproducts like trihalomethanes are monitored post-treatment, and residents occasionally report metallic or chlorine tastes.

Geology & Source: Allegheny River watershed through Appalachian Plateau; Devonian and Carboniferous shales, sandstones, and limestones including the Pocono Formation and Catskill Group — limestone weathering yields dissolved calcium and magnesium, hard supply

Other Pennsylvania Water Reports

Wilkinsburg

≈ 120–179 mg/L

🟠 Hard

Plum

≈ 180+ mg/L

🔴 Very Hard

Monroeville

≈ 120–179 mg/L

🟠 Hard

Lower Burrell

≈ 120–179 mg/L

🟠 Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Penn Hills's water safe to drink?

Yes. Penn Hills's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Penn Hills?

At ≈ 120–179 mg/L (Hard), Penn Hills's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Penn Hills compare to the USA average?

The USA national average is 151 mg/L. Penn Hills (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Penn Hills is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.