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

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

Corinth Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.1

neutral = 7.0

Lead

0.003 mg/L

✓ Below action level

TDS

392.4 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 Corinth, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Corinth	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 Corinth compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Corinth, Texas	≈ 120–179 mg/L	79.6 ppt	🟠 Hard	reservoir
Highland Village, Texas	≈ 120–179 mg/L	97.8 ppt	🟠 Hard	reservoir
Denton, Texas	≈ 120–179 mg/L	99 ppt	🟠 Hard	reservoir
Little Elm, Texas	≈ 120–179 mg/L	64.3 ppt	🟠 Hard	reservoir
Lewisville, Texas	≈ 120–179 mg/L	140.8 ppt	🟠 Hard	reservoir

National Benchmark

How Corinth compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 392.4 mg/LpH: 8.1

The City of Corinth, Texas is served by the Upper Trinity Regional Water District (UTRWD), which operates a regional water treatment plant supplying purchased surface water to the city. The primary source is Lake Lewisville, a major reservoir in Denton County that serves as the raw water supply for treatment and distribution throughout Corinth's service area. The UTRWD manages regional infrastructure ensuring a reliable treated supply for this growing north Texas community.

Corinth's water originates from the Upper Trinity River watershed, which drains through Cretaceous limestone and dolomite formations characteristic of north-central Texas. These carbonate-rich geological units dissolve readily as water percolates through soil and rock, introducing significant concentrations of calcium and magnesium ions. The resulting supply exhibits hard water characteristics typical of the region, shaped by the underlying geology of the Trinity Basin.

Residents can expect scale buildup in water heaters, reduced soap effectiveness, and mineral deposits on fixtures and appliances. Hard water reduces the efficiency of dishwashers and washing machines, and a water softener is recommended to protect household systems and extend appliance lifespan. Corinth's 2024 Water Quality Report confirms all tested contaminants remain well below EPA maximum contaminant levels with zero violations; lead measured at 0.0037 mg/L, well within safe limits, and the UTRWD treatment process ensures consistent compliance with all federal and state drinking water standards.

Geology & Source: Lake Lewisville watershed, Denton County — Upper Trinity River drains Cretaceous and Paleozoic limestone and dolomite; carbonate formations dissolve calcium and magnesium, producing hard water typical of north-central Texas

Other Texas Water Reports

Highland Village

≈ 120–179 mg/L

🟠 Hard

Denton

≈ 120–179 mg/L

🟠 Hard

Little Elm

≈ 120–179 mg/L

🟠 Hard

Lewisville

≈ 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 Corinth's water safe to drink?

Yes. Corinth'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 Corinth?

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

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