Forest Park Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
627.5 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 Forest Park, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Forest Park | 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 Forest Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Forest Park, Ohio | ≈ 120–179 mg/L | 9.6 ppt | 🟠 Hard | groundwater |
| Springdale, Ohio | ≈ 120–179 mg/L | 4 ppt | 🟠 Hard | river |
| Fairfield, Ohio | ≈ 120–179 mg/L | 16 ppt | 🟠 Hard | groundwater |
| Northbrook, Ohio | ≈ 180+ mg/L | 9.9 ppt | 🔴 Very Hard | river |
| Reading, Ohio | ≈ 120–179 mg/L | 8.1 ppt | 🟠 Hard | river |
National Benchmark
How Forest Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Forest Park | ≈ 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 Forest Park's Water Unique?
Local geology and source profile
Forest Park, Ohio is supplied by Greater Cincinnati Water Works (GCWW), which serves over 80 communities in Hamilton County and surrounding areas. The utility operates two main treatment plants: the Richard Miller Treatment Plant processing Ohio River surface water, and the Charles M. Bolton Plant treating groundwater from the Great Miami Buried Valley Aquifer. Forest Park purchases its entire water supply from GCWW, receiving finished water distributed through local infrastructure without additional treatment; GCWW reports consistent compliance with Ohio EPA and federal standards through monthly monitoring.
The Ohio River watershed, spanning Appalachian Plateau limestones and shales, feeds the surface supply, while the Great Miami Buried Valley Aquifer provides groundwater from unconsolidated glacial sands and gravels over Ordovician bedrock. These geological features are rich in carbonate rocks — Devonian dolomites and limestones of the Cincinnati Arch region — that dissolve to impart elevated calcium and magnesium ions. The mixed sourcing produces consistently mineralized, hard water typical of Midwest river and valley-fill aquifer systems.
Hard water in Forest Park causes scale buildup in water heaters, dishwashers, coffee makers, and boilers; faucets develop limescale rings and pipes face reduced flow over time, increasing energy costs. Regular vinegar descaling, installing drain screens, and using water-efficient fixtures help mitigate effects; a whole-house water softener is recommended. Treatment includes coagulation, sand filtration, granular activated carbon, UV disinfection, and chlorination; pH is maintained at 7.5–8.5 via orthophosphate addition for corrosion control, with no recent PFAS exceedances and occasional trace disinfection byproducts remaining below MCLs.
Geology & Source: Ohio River watershed — Devonian limestones and shales of the Cincinnati Arch; Great Miami Buried Valley Aquifer (Pleistocene valley-fill sands and gravels over Ordovician bedrock); carbonate dissolution yields characteristically hard supply
Other Ohio Water Reports
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Frequently Asked Questions
Is Forest Park's water safe to drink?
Do I need a water softener in Forest Park?
How does Forest Park compare to the USA average?
Data Sources & Methodology
Water quality data for Forest Park 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.