How does Port Hueneme's water compare to the national average?

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

Port Hueneme Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.3

neutral = 7.0

Lead

0.009 mg/L

✓ Below action level

TDS

587.5 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 Port Hueneme, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Port Hueneme	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 Port Hueneme compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Port Hueneme, California	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Oxnard, California	285 mg/L	0 ppt	🔴 Very Hard	reservoir
Ventura, California	≈ 180+ mg/L	6.1 ppt	🔴 Very Hard	reservoir
Camarillo, California	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Santa Paula, California	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater

National Benchmark

How Port Hueneme compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Port Hueneme	≈ 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 Port Hueneme's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 587.5 mg/LpH: 8.3

The Port Hueneme Water Agency (PHWA) serves the City of Port Hueneme and surrounding areas in Ventura County, California. The utility operates a mixed water supply system drawing from both groundwater sources via the Oxnard Plain aquifer and imported surface water from the Metropolitan Water District of Southern California. Treatment facilities process both sources to meet state and federal drinking water standards before distribution to approximately 6,000 service connections.

The Oxnard Plain aquifer system underlies the coastal Ventura County region and consists primarily of Quaternary alluvial deposits interspersed with Pliocene-age sedimentary formations. Beneath these lie Miocene marine sediments. The geological composition — featuring silicate minerals and carbonate-bearing strata — naturally contributes dissolved calcium and magnesium ions to groundwater, producing a hard water supply characteristic of much of Southern California's coastal plain regions.

At hard hardness levels, Port Hueneme residents may observe scale buildup in kettles, coffee makers, and water heaters, as well as reduced soap and detergent effectiveness. Appliances with heating elements — particularly water heaters and dishwashers — are most susceptible to mineral accumulation and reduced efficiency over time. Regular descaling maintenance and consideration of point-of-use or whole-house water softening systems are recommended. According to the Port Hueneme Water Agency's 2024 Annual Water Quality Report, the system maintains good overall water quality with only minor concerns noted, and the agency reports compliance with all federal and state drinking water standards.

Geology & Source: Oxnard Plain aquifer system — Quaternary alluvial deposits and Pliocene-age sedimentary formations overlying Miocene marine sediments; silicate minerals and carbonate-bearing strata dissolve calcium and magnesium, producing hard groundwater

Other California Water Reports

Oxnard

285 mg/L

🔴 Very Hard

Ventura

≈ 180+ mg/L

🔴 Very Hard

Camarillo

≈ 120–179 mg/L

🟠 Hard

Santa Paula

≈ 180+ mg/L

🔴 Very 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 Port Hueneme's water safe to drink?

Yes. Port Hueneme'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 Port Hueneme?

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

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