Overland Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.9
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
272.8 mg/L
Est. Daily Cost
$0.40
energy & soap waste
Source: See methodology section below · Updated 2026
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 Overland, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Overland | 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 Overland compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Overland, Missouri | ≈ 120–179 mg/L | 4.8 ppt | 🟠 Hard | groundwater |
| Saint Ann, Missouri | ≈ 120–179 mg/L | 3.7 ppt | 🟠 Hard | river |
| Maryland Heights, Missouri | 164 mg/L | 5.5 ppt | 🟠 Hard | river |
| University City, Missouri | ≈ 120–179 mg/L | 5.3 ppt | 🟠 Hard | river |
| Clayton, Missouri | ≈ 180+ mg/L | 4.7 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Overland compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Overland | ≈ 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 Overland's Water Unique?
Local geology and source profile
The Overland Water Utility provides drinking water to roughly 8,500 residents in St. Louis County, Missouri. Their supply comes from a combination of surface water and groundwater sources common to the St. Louis metropolitan area, including regional aquifers and surface intakes. The utility boasts an excellent compliance history, with no total violations since 2023, and all tap water consistently meets EPA safety standards. The Overland water system's quality is shaped by the Mississippi River valley's geology and the Ozark Plateau's underlying carbonate formations.
The region's bedrock is predominantly made up of Ordovician and Devonian limestone and dolomite units, specifically the Plattin and Joachim Limestone groups. These highly soluble rocks allow groundwater percolating through them to dissolve calcium and magnesium carbonates, resulting in a naturally hard water supply. This geological makeup is characteristic of the entire St. Louis region, contributing to the elevated mineral content found throughout the area.
Residents will likely notice moderate scaling on fixtures and reduced soap efficiency due to the water's hardness. Over time, mineral buildup can also affect water heaters and appliances. For households prioritizing mineral deposit reduction, appliance longevity, or improved soap performance, a point-of-use water softener or reverse osmosis system is frequently recommended. Simple maintenance, like regular water heater flushing and periodic descaling of items such as coffee makers and kettles, can help extend the life of household equipment. The Overland water system adheres to all EPA and state drinking water regulations.
Geology & Source: Ordovician and Devonian limestone and Mississippian dolomite; soluble carbonate bedrock dissolves to create hard water
Other Missouri Water Reports
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Frequently Asked Questions
Is Overland's water safe to drink?
Do I need a water softener in Overland?
How does Overland compare to the USA average?
Data Sources & Methodology
Water quality data for Overland is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
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.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
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.
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.
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.
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.