Soledad Water Hardness & Quality Report (2026)
Water Hardness
10 grains per gallon
Source
groundwater
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
518 mg/L
Est. Daily Cost
$0.45
energy & soap waste
Source: See methodology section below · Updated 2026
Partially verified. Water source and contaminant data are from federal databases. Hardness, pH, and TDS values are regional estimates based on surrounding monitoring stations.
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 Soledad, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Soledad | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.5 yrs | 8.5 yrs | -24% |
| Washing Machine | 9.2 yrs | 12 yrs | -23% |
| Water Heater | 11.6 yrs | 15 yrs | -23% |
Regional Water Comparison
How Soledad compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Soledad, California | 170.5 mg/L | 0 ppt | 🟠 Hard | groundwater |
| Greenfield, California | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
| King City, California | 205 mg/L | 6.5 ppt | 🔴 Very Hard | groundwater |
| Salinas, California | 254 mg/L | 0 ppt | 🔴 Very Hard | groundwater |
| Hollister, California | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
National Benchmark
How Soledad compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Soledad | 170.5 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Soledad's Water Unique?
Local geology and source profile
Soledad, California, in Monterey County in the heart of the Salinas Valley, receives its municipal water from the City of Soledad Public Works Department, which draws from groundwater wells tapping the Salinas Valley Groundwater Basin — one of the most productive and most overdrafted agricultural aquifer systems in California. The Salinas Valley is a broad alluvial valley between the Santa Lucia Range and Diablo Range, and its groundwater basin provides irrigation and municipal supply to California's premier vegetable-growing region. Soledad's wells access the shallow unconfined and deeper confined alluvial aquifer zones beneath the valley floor.
The hard 170.5 mg/L hardness reflects the mineral richness of the Salinas Valley Groundwater Basin. The alluvial aquifer is composed of Quaternary sediments derived from erosion of both the Santa Lucia Range (to the west, with Cretaceous marine sedimentary rocks) and the Diablo Range (to the east, with Franciscan Complex melange including marine shale and chert). Calcareous marine sediments from the western Coast Range contribute calcium carbonate to the aquifer, while deep basin sediments from Pliocene lacustrine and marine deposits add additional mineral load. The high TDS of 518 mg/L reflects the valley's extensive agricultural irrigation cycling, which concentrates dissolved salts.
At 170.5 mg/L, Soledad's water is hard, producing consistent mineral-related effects for residents. Scale forms steadily in kettles, coffee machines, and water heaters, and the elevated TDS contributes a pronounced mineral taste in drinking water. Faucet aerators and showerheads accumulate deposits requiring regular cleaning. Monthly descaling of heating appliances is recommended. An under-sink reverse osmosis system is an effective and popular choice in Soledad — it addresses both the mineral taste from high TDS and the hardness simultaneously, and provides cleaner water for cooking and drinking than unfiltered tap in this valley floor community.
Geology & Source: Soledad in Monterey County draws from the Salinas Valley Groundwater Basin — a deep alluvial aquifer in the Salinas River valley where Quaternary marine terrace sediments and alluvial fans derived from Cretaceous and Tertiary Coast Range formations contain calcareous marine sediments and calcareous cement — hard water at 170.5 mg/L with elevated TDS from deep basin mineral enrichment.
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Frequently Asked Questions
Is Soledad's water safe to drink?
Do I need a water softener in Soledad?
How does Soledad compare to the USA average?
Data Sources & Methodology
Water quality data for Soledad is partially sourced from federal databases. Fields without direct station coverage are derived from regional estimates — see field-level detail below.
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.