How does Fair Oaks's water compare to the national average?

The USA national average is 151 mg/L. Fair Oaks (≈ 120–179 mg/L) is 1 mg/L softer than average.

Fair Oaks Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.9

neutral = 7.0

Lead

0.006 mg/L

✓ Below action level

TDS

340.1 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

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 Fair Oaks, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Fair Oaks	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 Fair Oaks compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Fair Oaks, California	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Orangevale, California	≈ 180+ mg/L	0 ppt	🔴 Very Hard	reservoir
Carmichael, California	≈ 180+ mg/L	21.8 ppt	🔴 Very Hard	mixed
Citrus Heights, California	≈ 0–60 mg/L	0 ppt	🟢 Soft	reservoir
Rancho Cordova, California	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir

National Benchmark

How Fair Oaks compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Fair Oaks	≈ 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 Fair Oaks's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 340.1 mg/LpH: 7.9

Fair Oaks Water District (FOWD) serves approximately 35,475 customers across Fair Oaks and nearby areas in Sacramento County, California. The utility sources water from purchased surface water, primarily from the American River, and its own local groundwater wells. Treatment involves conventional methods including disinfection with hypochlorite at facilities managed by FOWD, located at 10326 Fair Oaks Blvd., Fair Oaks, CA 95628. All supplies meet or exceed state and federal drinking water standards, with wells noted for excellent quality.

The American River watershed, spanning the Sierra Nevada to the Sacramento Valley, feeds surface water influenced by Sierra Nevada batholith granites and Paleozoic and Mesozoic metamorphic rocks that weather into moderately mineralised flows. Local groundwater comes from Sacramento Valley alluvial aquifers recharged by river infiltration through Quaternary sedimentary layers of sands, gravels, and silts from Pleistocene river deposits. This combination imparts a hard supply character through calcium and magnesium leaching from carbonate-influenced soils and volcanic parent materials upstream.

Hard water in Fair Oaks leads to scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Annual damages can reach $1,230–1,770 per household from appliance repairs and energy waste. Maintenance includes regular descaling of fixtures, using vinegar for faucets, and installing sediment filters. A water softener is recommended to prevent limescale, extend appliance life, and improve soap efficiency, especially in homes with visible deposits. One contaminant exceeds health guidelines; customers can access Consumer Confidence Reports via direct utility contact for full monitoring details.

Geology & Source: American River watershed — Sierra Nevada batholith granites and Paleozoic-Mesozoic metamorphic rocks; Sacramento Valley Quaternary alluvial aquifers (Pleistocene sands, gravels, silts); calcium and magnesium leaching yields hard supply

Other California Water Reports

Orangevale

≈ 180+ mg/L

🔴 Very Hard

Carmichael

≈ 180+ mg/L

🔴 Very Hard

Citrus Heights

≈ 0–60 mg/L

🟢 Soft

Rancho Cordova

≈ 120–179 mg/L

🟠 Hard

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All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Fair Oaks's water safe to drink?

Yes. Fair Oaks's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Fair Oaks?

At ≈ 120–179 mg/L (Hard), Fair Oaks's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Fair Oaks compare to the USA average?

The USA national average is 151 mg/L. Fair Oaks (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Fair Oaks is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

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.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

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.

Measured

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.

Modelled

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.

Calculated

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.