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

The USA national average is 151 mg/L. Moorpark (≈ 180+ mg/L) is 189 mg/L harder than average.

Moorpark Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.4

neutral = 7.0

Lead

0.003 mg/L

✓ Below action level

TDS

141.9 mg/L

Est. Daily Cost

$0.91

energy & soap waste

Source: See methodology section below · Updated 2026

very hard180+ mg/LVery Hard · 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 Moorpark, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Moorpark	Soft Water City	Efficiency Loss
Kettle	4.7 yrs	8.5 yrs	-45%
Washing Machine	6.6 yrs	12 yrs	-45%
Water Heater	8.3 yrs	15 yrs	-45%

Regional Water Comparison

How Moorpark compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Moorpark, California	≈ 180+ mg/L	0 ppt	🔴 Very Hard	reservoir
Simi Valley, California	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Fillmore, California	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater
Thousand Oaks, California	148 mg/L	0 ppt	🟠 Hard	reservoir
Oak Park, California	≈ 120–179 mg/L	5.9 ppt	🟠 Hard	mixed

National Benchmark

How Moorpark compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Moorpark	≈ 180+ mg/L	🔴 High
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Moorpark's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 141.9 mg/LpH: 7.4

Ventura County Water District No. 1 – Moorpark Water Company delivers purchased surface water to approximately 37,906 residents in the Moorpark area (zip code 93021). The utility's service address is 800 S. Victoria Ave, Ventura, CA 93009, and customer service can be reached at 805-654-2018. The water supply originates from purchased surface water sources in the Ventura County watershed, rather than from local groundwater or reservoirs operated directly by the district.

Moorpark's supply is influenced by the underlying geology of coastal Ventura County, characterized by Quaternary alluvial deposits and Tertiary marine sediments of Pliocene–Miocene age, including sandstone and siltstone formations rich in calcium and magnesium minerals. This marine-influenced geology, characteristic of the Ventura Basin, contributes significantly to the mineral content and hardness profile of the water. The supply is classified as very hard, with hardness levels of 20–50 grains per gallon — more than twice the threshold for the very hard classification.

At this very hard classification, residents can expect significant scale buildup in water heaters, kettles, and dishwashers, along with reduced soap and detergent effectiveness and potential damage to plumbing fixtures and appliances over time. A whole-house water softener is strongly recommended to protect appliances and extend equipment life. The utility's water may contain concerning contaminants including Acetochlor, Thallium, and Chloromethane; residents should consult the district's annual Consumer Confidence Report (CCR) for comprehensive testing data, pH levels, and lead/copper compliance status.

Geology & Source: Ventura County watershed; Quaternary alluvial deposits and Tertiary Pliocene–Miocene marine sandstone and siltstone — calcium and magnesium-rich marine strata produce very hard water typical of coastal Ventura County

Other California Water Reports

Simi Valley

≈ 120–179 mg/L

🟠 Hard

Fillmore

≈ 180+ mg/L

🔴 Very Hard

Thousand Oaks

148 mg/L

🟠 Hard

Oak Park

≈ 120–179 mg/L

🟠 Hard

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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 Moorpark's water safe to drink?

Yes. Moorpark's water meets all federal safety standards. The hardness is ≈ 180+ mg/L (Very Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Moorpark?

At ≈ 180+ mg/L (Very Hard), Moorpark'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 45%.

How does Moorpark compare to the USA average?

The USA national average is 151 mg/L. Moorpark (≈ 180+ mg/L) is 189 mg/L above the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Moorpark 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.