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

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

Effingham Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

river

pH Level

7.8

neutral = 7.0

Lead

0.006 mg/L

✓ Below action level

TDS

454.3 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 Effingham, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Effingham	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 Effingham compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Effingham, Illinois	≈ 180+ mg/L	0 ppt	🔴 Very Hard	river
Mattoon, Illinois	≈ 180+ mg/L	6.7 ppt	🔴 Very Hard	river
Charleston, Illinois	≈ 180+ mg/L	3.2 ppt	🔴 Very Hard	river
Decatur, Illinois	≈ 120–179 mg/L	0 ppt	🟠 Hard	river
Centralia, Illinois	≈ 120–179 mg/L	0 ppt	🟠 Hard	river

National Benchmark

How Effingham compares to the USA average

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

Local geology and source profile

Source: RiverTDS: 454.3 mg/LpH: 7.8

The City of Effingham Water Department provides water for about 12,000 residents in Effingham County, Illinois. Their supply comes from several municipal wells that draw from underground aquifers, bypassing surface water sources like rivers or lakes. While no specific treatment plants are named, the groundwater undergoes typical treatment at the wellheads before reaching homes. The utility adheres to all Environmental Protection Agency standards and makes its yearly Consumer Confidence Reports accessible. Effingham sits in the Kaskaskia River watershed.

Groundwater for Effingham originates in the Mahomet Bedrock Valley Aquifer, a buried valley from the Pleistocene epoch. This aquifer contains glacial sands and gravels layered above older bedrock formations, including the Edgewood Dolomite and Kankakee Limestone. The natural dissolution of minerals from these carbonate-rich rocks, like limestone and dolomite, is what gives the water its hardness. This is a common characteristic for groundwater sourced from the region's geology.

Homeowners in Effingham often deal with the consequences of this very hard water, which causes scale to build up in plumbing, water heaters, dishwashers, and washing machines. This buildup not only reduces the efficiency and lifespan of these appliances but also leads to visible white deposits on fixtures. You’ll also notice that more soap and detergent are needed for effective cleaning. While routine maintenance like descaling appliances can help, installing a water softener is highly recommended to combat scaling and improve how your appliances perform.

Geology & Source: Glacial drift and sandstone aquifers; limestone and dolomite bedrock; high hardness from mineral dissolution

Other Illinois Water Reports

Mattoon

≈ 180+ mg/L

🔴 Very Hard

Charleston

≈ 180+ mg/L

🔴 Very Hard

Decatur

≈ 120–179 mg/L

🟠 Hard

Centralia

≈ 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 Effingham's water safe to drink?

Yes. Effingham'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 Effingham?

At ≈ 180+ mg/L (Very Hard), Effingham'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 Effingham compare to the USA average?

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