Bloomington Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
8
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
396.9 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 Bloomington, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Bloomington | 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 Bloomington compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Bloomington, California | ≈ 120–179 mg/L | 6 ppt | 🟠 Hard | groundwater |
| Rialto, California | 160 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Fontana, California | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Rubidoux, California | ≈ 120–179 mg/L | 6.8 ppt | 🟠 Hard | mixed |
| Colton, California | ≈ 180+ mg/L | 118.3 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Bloomington compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Bloomington | ≈ 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 Bloomington's Water Unique?
Local geology and source profile
Bloomington, California, is served by the West Valley Water District (WVWD), a public water utility providing treated drinking water to portions of Rialto, Colton, Fontana, Bloomington, and adjacent unincorporated areas of San Bernardino County. The district blends surface water from regional reservoirs and imported supplies with groundwater pumped from the San Bernardino Basin aquifer system. Treated water is delivered through a network of distribution mains and storage facilities designed to meet peak-demand conditions and regulatory standards.
The watershed feeding Bloomington's supply includes the upper Santa Ana River basin and associated alluvial fans that channel runoff into regional reservoirs and recharge zones. Groundwater is drawn from the San Bernardino Basin aquifer, composed of unconsolidated Quaternary alluvium overlying older Cretaceous and Tertiary sedimentary rocks. As water moves through these calcium- and magnesium-rich sediments and weathered formations, it becomes mineralised, producing a hard supply typical of much of inland Southern California.
At a hard water level, residents in Bloomington can expect noticeable scale buildup in water heaters, dishwashers, and showerheads, as well as reduced soap lathering and spotting on glassware and fixtures. Appliances such as tank-style water heaters, coffee makers, and ice machines are particularly susceptible to scaling and may require more frequent descaling or maintenance. Installing a water softener is generally recommended to reduce scale, extend appliance life, and improve cleaning efficiency. The West Valley Water District publishes an annual Water Quality Report confirming compliance with all applicable EPA standards, with over 450 tested contaminants within safe health-based limits and PFAS monitored with no current violations.
Geology & Source: San Bernardino Basin aquifer — Quaternary alluvium over Cretaceous and Tertiary sedimentary formations; calcium- and magnesium-rich sediments produce hard to very hard water typical of inland Southern California
Other California Water Reports
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Frequently Asked Questions
Is Bloomington's water safe to drink?
Do I need a water softener in Bloomington?
How does Bloomington compare to the USA average?
Data Sources & Methodology
Water quality data for Bloomington 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.