How does Erie's water compare to the national average?

The USA national average is 151 mg/L. Erie (≈ 180+ mg/L) is 189 mg/L harder than average.

Erie Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

river

pH Level

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

138 mg/L

Est. Daily Cost

$0.91

energy & soap waste

Source: See methodology section below · Updated 2026

very hard180+ mg/LVery Hard · 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 Erie, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Erie	Soft Water City	Efficiency Loss
Kettle	4.7 yrs	8.5 yrs	-45%
Washing Machine	6.6 yrs	12 yrs	-45%
Water Heater	8.3 yrs	15 yrs	-45%

Regional Water Comparison

How Erie compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Erie, Pennsylvania	≈ 180+ mg/L	🔴 Very Hard	river
Meadville, Pennsylvania	≈ 180+ mg/L	🔴 Very Hard	groundwater
Conneaut, Ohio	≈ 120–179 mg/L	🟠 Hard	river
Ashtabula, Ohio	≈ 180+ mg/L	🔴 Very Hard	river
Oil City, Pennsylvania	103.5 mg/L	🟡 Moderately Hard	groundwater

National Benchmark

How Erie compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Erie	≈ 180+ mg/L	🔴 High
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Erie's Water Unique?

Local geology and source profile

Source: RiverTDS: 138 mg/LpH: 8

Erie City Water Authority (ECWA) is the primary municipal water utility serving approximately 220,001 residents across 6 cities in Erie County, Pennsylvania. The utility draws its supply entirely from Lake Erie, the shallowest of the Great Lakes, treating raw water at its facility using conventional filtration, pre-oxidation with chlorine, and disinfection via chlorine and hypochlorite. The treatment plant is located at 340 W Bayfront Pkwy, Erie, PA, and serves a large regional population without reliance on groundwater or river diversions.

The Lake Erie watershed is underlain by Paleozoic sedimentary rocks, notably limestone and dolomite formations from the Silurian and Devonian periods. These carbonate-rich strata — including the Bass Islands Dolomite and Onondaga Limestone — leach dissolved calcium and magnesium into the water during treatment and distribution, imparting a very hard character to the supply. No groundwater aquifer is involved, as this is a pure surface water system, yet the regional carbonate geology dominates the mineralised profile observed post-treatment.

Very hard water in Erie causes significant scale buildup in water heaters, dishwashers, washing machines, and plumbing fixtures, reducing efficiency and shortening appliance lifespan. Annual maintenance costs can rise from frequent descaling; homeowners should install scale inhibitors and consider a whole-home water softener, which is highly recommended. ECWA reports 2 contaminants exceeding EPA health-based MCLGs and 9 exceeding health advocacy guidelines, including disinfection byproducts, arsenic, chromium-6, and agricultural chemicals; total dissolved solids measure 272 mg/L. Treatment details and lead/copper compliance are available in the 2026 Water Quality Report.

Geology & Source: Lake Erie basin — Paleozoic limestone and dolomite bedrock (Silurian–Devonian); Bass Islands Dolomite and Onondaga Limestone leach calcium and magnesium, producing hard supply despite freshwater lake source

Other Pennsylvania Water Reports

Meadville

≈ 180+ mg/L

🔴 Very Hard

Conneaut

≈ 120–179 mg/L

🟠 Hard

Ashtabula

≈ 180+ mg/L

🔴 Very Hard

Oil City

103.5 mg/L

🟡 Moderately 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 Erie's water safe to drink?

Yes. Erie's water meets all federal safety standards. The hardness is ≈ 180+ mg/L (Very Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Erie?

At ≈ 180+ mg/L (Very Hard), Erie'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 45%.

How does Erie compare to the USA average?

The USA national average is 151 mg/L. Erie (≈ 180+ mg/L) is 189 mg/L above the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Erie 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.