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

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

Portland Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.5

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

708.3 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 Portland, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Portland	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 Portland compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Portland, Texas	≈ 180+ mg/L	35.8 ppt	🔴 Very Hard	reservoir
Corpus Christi, Texas	≈ 180+ mg/L	0 ppt	🔴 Very Hard	reservoir
Rockport, Texas	≈ 180+ mg/L	55.8 ppt	🔴 Very Hard	reservoir
Robstown, Texas	≈ 120–179 mg/L	27.4 ppt	🟠 Hard	reservoir
Kingsville, Texas	≈ 120–179 mg/L	51.3 ppt	🟠 Hard	reservoir

National Benchmark

How Portland compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 708.3 mg/LpH: 8.5

The City of Portland Water Utility provides drinking water to residents of San Patricio County in the Coastal Bend area of South Texas. The utility operates water treatment facilities drawing from both groundwater and surface water sources, including connections to local aquifer systems and surface reservoirs typical of the region. The City of Portland publishes an Annual Drinking Water Quality Report as required by the Safe Drinking Water Act; residents should consult the most recent report for current pH, lead/copper compliance data, and treatment process details.

The Coastal Bend watershed underlying Portland is characterized by Quaternary and Tertiary sedimentary deposits overlying Cretaceous limestone and chalk formations. These carbonate-rich geological layers form part of the Gulf Coast Aquifer system. As water percolates through soil and fractured limestone, it dissolves significant quantities of calcium and magnesium, creating a mineralised supply characteristic of South Texas's very hard water profile.

Portland's water falls into the very hard category, consistent with Texas statewide averages exceeding 200 ppm. At this hardness level, residents typically experience scale buildup in water heaters, reduced soap effectiveness, and mineral deposits on fixtures and appliances. A whole-home water softener or ion exchange system is strongly recommended to address scale accumulation and appliance longevity; descaling with vinegar and lowering water heater temperatures can provide additional relief.

Geology & Source: Gulf Coast Aquifer system, Coastal Bend region; Quaternary and Tertiary sediments overlying Cretaceous limestone and chalk — dissolution of calcium and magnesium produces hard water

Other Texas Water Reports

Corpus Christi

≈ 180+ mg/L

🔴 Very Hard

Rockport

≈ 180+ mg/L

🔴 Very Hard

Robstown

≈ 120–179 mg/L

🟠 Hard

Kingsville

≈ 120–179 mg/L

🟠 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 Portland's water safe to drink?

Yes. Portland'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 Portland?

At ≈ 180+ mg/L (Very Hard), Portland'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 Portland compare to the USA average?

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