University City Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
river
pH Level
8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
317.6 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 University City, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In University City | 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 University City compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ University City, Missouri | ≈ 120–179 mg/L | 5.3 ppt | 🟠 Hard | river |
| Clayton, Missouri | ≈ 180+ mg/L | 4.7 ppt | 🔴 Very Hard | groundwater |
| Overland, Missouri | ≈ 120–179 mg/L | 4.8 ppt | 🟠 Hard | groundwater |
| Webster Groves, Missouri | ≈ 120–179 mg/L | 7.7 ppt | 🟠 Hard | river |
| Jennings, Missouri | ≈ 120–179 mg/L | 6.1 ppt | 🟠 Hard | river |
National Benchmark
How University City compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ University City | ≈ 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 University City's Water Unique?
Local geology and source profile
University City, Missouri is served by American Water (PWSID: MO6010716), which supplies water to St. Louis County, St. Charles County, and northern Jefferson County. The utility draws from two major sources: the Missouri River and the Meramec River. Water is treated at regional facilities and distributed at approximately 180 million gallons per day across the broad service area. Fluoride is added at 0.6 mg/L for dental health, and sodium levels range from 12–18 mg/L. Residents should consult the annual Consumer Confidence Report for detailed compliance data and any detected contaminants.
The St. Louis region's water supply originates in the Ozark Plateau and flows through ancient carbonate bedrock dominated by Ordovician and Cambrian limestone and dolomite formations. These soluble rock types—particularly the Plattin Limestone and Joachim Dolomite—naturally dissolve in water, releasing calcium and magnesium ions. This geological setting produces a hard water supply throughout the region, with mineral content shaped by the carbonate-rich aquifer systems underlying the watershed.
University City residents receive hard water that places demands on household appliances and plumbing. Scale buildup occurs in water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Soap and detergent effectiveness is diminished, and mineral deposits accumulate on fixtures. A water softener is typically recommended to reduce these effects and extend appliance longevity. American Water reports a pH range of 9.4–10.2 for the St. Louis region supply, indicating alkaline water; the utility maintains full compliance with lead and copper standards under EPA requirements.
Geology & Source: Missouri and Meramec Rivers drain the Ozark Plateau; Ordovician–Cambrian carbonate bedrock including Plattin Limestone and Joachim Dolomite dissolves readily — calcium and magnesium produce hard water in the St. Louis region
Other Missouri Water Reports
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All reports are reviewed by our team. Thank you for supporting data quality!
Frequently Asked Questions
Is University City's water safe to drink?
Do I need a water softener in University City?
How does University City compare to the USA average?
Data Sources & Methodology
Water quality data for University City 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.