Suisun Water Hardness & Quality Report (2026)
Water Hardness
10 grains per gallon
Source
mixed
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
523.5 mg/L
Est. Daily Cost
$0.46
energy & soap waste
Source: USGS Water Quality Portal · 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 Suisun, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Suisun | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.9 yrs | 8.5 yrs | -54% |
| Washing Machine | 7.3 yrs | 12 yrs | -39% |
| Water Heater | 8.7 yrs | 15 yrs | -42% |
Regional Water Comparison
How Suisun compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Suisun, California | 171.5 mg/L | 7 ppt | 🟠 Hard | mixed |
| Fairfield, California | 127.5 mg/L | 5.7 ppt | 🟠 Hard | mixed |
| Vacaville, California | 35 mg/L | 3 ppt | 🟢 Soft | mixed |
| Benicia, California | 182 mg/L | 7.3 ppt | 🔴 Very Hard | mixed |
| Bay Point, California | 119.5 mg/L | 5.5 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Suisun compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Suisun | 171.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Suisun's Water Unique?
Local geology and source profile
Suisun City, California, in Solano County — a major north San Francisco Bay Area Solano County community (Suisun City is a significant Solano County city — a north Bay Area community on the shores of Suisun Bay and Suisun Marsh (one of the largest contiguous estuarine marshes in the American West — Suisun Marsh covers over 116,000 acres and is one of the most important waterfowl habitat areas in California; the Suisun Marsh is a critical Pacific Flyway stopover for migratory waterfowl); Suisun City is adjacent to Travis Air Force Base (Travis AFB — one of the largest US Air Force bases in the nation by cargo throughput; Travis AFB is the primary Pacific gateway for US Air Force strategic airlift operations, and the Travis AFB area generates enormous economic activity for Solano County)), a diverse Solano County community with a significant military and veteran, African-American, Hispanic-American, and working-class population (the Travis AFB–Suisun City corridor is one of the most economically significant military-adjacent communities in Northern California), adjacent to Fairfield in the north Solano County corridor — draws its municipal water supply via the Suisun City Water Division. Water hardness in Suisun City measures 171.5 mg/L — classified as hard.
Suisun City's hard supply reflects the north Bay Area Solano County Sacramento River blend's calcareous-moderate character. The North Bay Aqueduct delivers Sacramento River supply to Suisun City with limited softening, producing the hard 171.5 mg/L.
At 171.5 mg/L, Suisun City residents face regular hard water challenges. Monthly descaling and water softeners are recommended. Suisun City Water Division consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Sacramento River (Solano County via the North Bay Aqueduct) via the Suisun City Water Division — the Solano County north San Francisco Bay Area Suisun City corridor (Quaternary calcareous-moderate Sacramento Delta alluvium and Pliocene calcareous-moderate Tehama Formation — the calcareous-moderate north Bay Area Solano County Sacramento River blend; limited softening); hard supply at 171.5 mg/L in Solano County.