How does Westpark's water compare to the national average?

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

Westpark Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

mixed

pH Level

neutral = 7.0

Lead

0.006 mg/L

✓ Below action level

TDS

409.1 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 Westpark, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Westpark	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 Westpark compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Westpark, California	≈ 120–179 mg/L	6.1 ppt	🟠 Hard	mixed
Irvine, California	≈ 120–179 mg/L	10 ppt	🟠 Hard	reservoir
Tustin Legacy, California	≈ 120–179 mg/L	14.6 ppt	🟠 Hard	reservoir
Woodbridge, California	≈ 120–179 mg/L	6.1 ppt	🟠 Hard	groundwater
El Camino Real, California	≈ 180+ mg/L	6.1 ppt	🔴 Very Hard	mixed

National Benchmark

How Westpark compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Westpark	≈ 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 Westpark's Water Unique?

Local geology and source profile

Source: MixedTDS: 409.1 mg/LpH: 8

Westpark in Orange County, California is served by the Irvine Ranch Water District (IRWD), which draws from a blended supply combining Metropolitan Water District (MWD) imported water and the Orange County Groundwater Basin, treated by the Orange County Water District (OCWD). The MWD import includes water from the Colorado River and the State Water Project (SWP). IRWD blends these imported surface supplies with locally treated groundwater before distributing water throughout the Westpark service area in this Irvine community.

The Orange County Groundwater Basin is underlain by Pleistocene and Quaternary alluvial deposits from the Santa Ana River basin — unconsolidated sands and gravels holding locally recharged groundwater. The MWD import component introduces water from the Colorado River and State Water Project, sources with higher mineral content from long-distance conveyance. IRWD's blended supply — combining these imports with OCWD-treated local groundwater — produces moderately hard water characteristic of this Orange County community.

Moderately hard water in Westpark produces gradual scale buildup in water heaters, dishwashers, and plumbing fixtures over time, with some reduction in soap efficiency. A water softener or scale inhibitor is worth considering for households with high appliance usage. Regular descaling of coffee makers, kettles, and showerheads will help maintain efficiency. The blended supply from IRWD and OCWD meets all applicable federal and state drinking water standards, and detailed water quality reports are available through IRWD at irwd.com.

Geology & Source: Orange County; Irvine Ranch Water District blends MWD import (Colorado River/State Water Project) with Orange County Groundwater Basin treated by OCWD; Pleistocene-Quaternary alluvial Santa Ana River basin; moderately hard water

Other California Water Reports

Irvine

≈ 120–179 mg/L

🟠 Hard

Tustin Legacy

≈ 120–179 mg/L

🟠 Hard

Woodbridge

≈ 120–179 mg/L

🟠 Hard

El Camino Real

≈ 180+ mg/L

🔴 Very Hard

Report an Issue

Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

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

Frequently Asked Questions

Is Westpark's water safe to drink?

Yes. Westpark'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 Westpark?

At ≈ 120–179 mg/L (Hard), Westpark'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 Westpark compare to the USA average?

The USA national average is 151 mg/L. Westpark (≈ 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 Westpark 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.