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

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

Ballwin Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

river

pH Level

7.5

neutral = 7.0

Lead

0.001 mg/L

✓ Below action level

TDS

135.1 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 Ballwin, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Ballwin	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 Ballwin compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Ballwin, Missouri	≈ 180+ mg/L	3.3 ppt	🔴 Very Hard	river
Manchester, Missouri	≈ 120–179 mg/L	4.6 ppt	🟠 Hard	river
Chesterfield, Missouri	≈ 120–179 mg/L	10.1 ppt	🟠 Hard	river
Town and Country, Missouri	≈ 120–179 mg/L	3.6 ppt	🟠 Hard	river
Wildwood, Missouri	≈ 180+ mg/L	4.1 ppt	🔴 Very Hard	river

National Benchmark

How Ballwin compares to the USA average

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

Bring Scarsdale-quality water to your Ballwin home

Shop water softeners on Amazon.com →

Shop Now

What Makes Ballwin's Water Unique?

Local geology and source profile

Source: RiverTDS: 135.1 mg/LpH: 7.5

Ballwin, Missouri is served by Seven Trails West Subdivision water utility, which supplies approximately 435 people in ZIP code 63011. The utility draws groundwater from the Ozark Plateau aquifer system beneath the St. Louis metropolitan area and treats it to meet all EPA standards before distribution to customers.

The Ballwin water supply originates from the Ozark Plateau aquifer, tapping Ordovician and Cambrian-age carbonate formations including the Eminence Dolomite and Potosi Dolomite. These ancient marine sediments are highly soluble; as groundwater percolates through them, it dissolves substantial quantities of calcium and magnesium carbonates. This geological setting is responsible for the characteristically very hard water throughout the region, typical of the greater St. Louis area.

At very hard levels, Ballwin residents should expect significant scaling in water heaters, kettles, and dishwashers, as well as reduced soap and detergent effectiveness. Washing machines and water heaters accumulate mineral deposits requiring more frequent maintenance. Installation of a whole-house water softener is strongly recommended to extend appliance lifespan, improve cleaning efficiency, and reduce energy consumption. Point-of-use reverse osmosis is also an effective option for drinking and cooking water. According to EPA testing data, all 147+ contaminants tested in Ballwin's supply are within EPA Maximum Contaminant Level Goals (MCLGs), and the groundwater source provides natural protection from many surface contaminants.

Geology & Source: Ozark Plateau aquifer system beneath St. Louis metro; Ordovician and Cambrian Eminence Dolomite and Potosi Dolomite — highly soluble carbonate formations dissolve substantial calcium and magnesium, producing very hard water characteristic of the

Other Missouri Water Reports

Manchester

≈ 120–179 mg/L

🟠 Hard

Chesterfield

≈ 120–179 mg/L

🟠 Hard

Town and Country

≈ 120–179 mg/L

🟠 Hard

Wildwood

≈ 180+ mg/L

🔴 Very Hard

Report an Issue

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 Ballwin's water safe to drink?

Yes. Ballwin'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 Ballwin?

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

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