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

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

Batavia Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.7

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

199.5 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 Batavia, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Batavia	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 Batavia compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Batavia, Illinois	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater
Geneva, Illinois	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
North Aurora, Illinois	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater
St. Charles, Illinois	≈ 180+ mg/L	7.4 ppt	🔴 Very Hard	groundwater
Aurora, Illinois	≈ 60–120 mg/L	45.3 ppt	🟡 Moderately Hard	river

National Benchmark

How Batavia compares to the USA average

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

Local geology and source profile

Source: GroundwaterTDS: 199.5 mg/LpH: 7.7

The City of Batavia Public Works Department operates the municipal water utility, serving approximately 26,808 residents in Batavia, Illinois, in Kane County. Water is sourced entirely from groundwater wells, with no specific treatment plant names detailed in available reports. Annual Water Quality Reports (Consumer Confidence Reports) are published at bataviail.gov; the utility is located at 100 N Island Avenue, Batavia, IL 60510-1930 and can be reached at 630-454-2000.

Batavia's groundwater recharge area is part of the Fox River basin in northeastern Illinois, where precipitation infiltrates glacial drift and bedrock. Key geological features include Ordovician and Silurian carbonate aquifers — including the Edgewood and Ancell Groups and formations of the Galena-Platteville Group and Maquoketa Formation — overlain by Pleistocene glacial tills. These limestone and dolomite formations release calcium and magnesium ions through karst fractures, creating a highly mineralized, hard supply from prolonged rock-water interaction in confined aquifers.

Very hard water in Batavia causes significant scale buildup in water heaters, boilers, dishwashers, and washing machines, reducing efficiency and lifespan. Soap lathering is poor, leaving films on skin, hair, and laundry. Regular descaling, vinegar soaks for fixtures, and installation of a water softener are strongly recommended. Groundwater contaminants flagged in public notices include Uranium, Perchlorate, Isopropyl alcohol, and Desisopropylatrazine; full compliance details appear in the city's annual CCRs at bataviail.gov/o/pw/page/water-quality-reports.

Geology & Source: Northern Illinois Paleozoic carbonate aquifers; Ordovician-Silurian Galena-Platteville Group and Maquoketa Formation limestone and dolomite — karst dissolution yields hard supply

Other Illinois Water Reports

Geneva

≈ 120–179 mg/L

🟠 Hard

North Aurora

≈ 180+ mg/L

🔴 Very Hard

St. Charles

≈ 180+ mg/L

🔴 Very Hard

Aurora

≈ 60–120 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 Batavia's water safe to drink?

Yes. Batavia'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 Batavia?

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

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