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

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

Mentor Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

river

pH Level

7.6

neutral = 7.0

Lead

0.001 mg/L

✓ Below action level

TDS

161.7 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 Mentor, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Mentor	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 Mentor compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Mentor, Ohio	≈ 120–179 mg/L	0 ppt	🟠 Hard	river
Willoughby, Ohio	≈ 180+ mg/L	7.5 ppt	🔴 Very Hard	river
Painesville, Ohio	≈ 120–179 mg/L	0 ppt	🟠 Hard	river
Eastlake, Ohio	≈ 120–179 mg/L	5.3 ppt	🟠 Hard	river
Wickliffe, Ohio	≈ 180+ mg/L	7 ppt	🔴 Very Hard	river

National Benchmark

How Mentor compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Mentor	≈ 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 Mentor's Water Unique?

Local geology and source profile

Source: RiverTDS: 161.7 mg/LpH: 7.6

Mentor, Ohio is served by Aqua Ohio – Mentor Division (PWSID OH4301511), a private water utility. The system draws its entire drinking water supply from Lake Erie, approximately 3 miles offshore from the city, treated at a surface water treatment plant before distribution to approximately 74,500 residents across Mentor and surrounding areas in Lake County, Ohio. The 2024 Water Quality Report noted 3 contaminants above EPA health-based guidelines (MCLGs), earning a water quality grade of 70/100. Emergency contact is available 24/7 at (440) 350-2155.

The Lake Erie watershed drains a vast region of the Great Lakes basin, with underlying geology dominated by Devonian-age limestone and shale formations, overlain by Quaternary glacial deposits left by the last ice age. These carbonate-rich rock formations and glacial till dissolve readily into surface runoff, contributing minerals that create the hard water characteristic typical of northeastern Ohio and the Great Lakes region.

Mentor's water is hard at 122 mg/L (7 grains per gallon), causing noticeable scale buildup on fixtures, reduced soap lathering, and potential dry skin. Water heaters, dishwashers, and washing machines are particularly vulnerable to mineral deposits that reduce efficiency and lifespan. A water softener is recommended to mitigate these effects and reduce long-term maintenance costs and energy consumption. The system employs surface water treatment including disinfection and monitoring for haloacetic acids (HAAs) and trihalomethanes (TTHMs); Lake Erie is susceptible to contamination from wastewater discharges and urban runoff, underscoring the importance of ongoing treatment oversight.

Geology & Source: Lake Erie glacially-carved basin; Devonian-age limestones and shales overlain by Quaternary glacial till — carbonate mineral dissolution from limestone and glacial deposits produces hard water typical of northeastern Ohio

Other Ohio Water Reports

Willoughby

≈ 180+ mg/L

🔴 Very Hard

Painesville

≈ 120–179 mg/L

🟠 Hard

Eastlake

≈ 120–179 mg/L

🟠 Hard

Wickliffe

≈ 180+ mg/L

🔴 Very 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 Mentor's water safe to drink?

Yes. Mentor'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 Mentor?

At ≈ 120–179 mg/L (Hard), Mentor'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 Mentor compare to the USA average?

The USA national average is 151 mg/L. Mentor (≈ 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 Mentor 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.