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

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

Conroe Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.7

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

117 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 Conroe, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Conroe	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 Conroe compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Conroe, Texas	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
The Woodlands, Texas	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Spring, Texas	≈ 120–179 mg/L	10.5 ppt	🟠 Hard	reservoir
Tomball, Texas	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
New Caney, Texas	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater

National Benchmark

How Conroe compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 117 mg/LpH: 7.7

The City of Conroe Utilities Department serves approximately 89,956 people across Conroe and nearby areas in Montgomery County, Texas. Primary surface water is sourced from Lake Conroe, a reservoir on the West Fork San Jacinto River, treated at the City of Conroe Water Treatment Plant. Supplemental groundwater is drawn from the Gulf Coast Aquifer via wells to meet peak demands, maintaining a mixed supply to ensure reliability amid growing population pressures in the Houston metro region.

The West Fork San Jacinto River watershed drains piney woods and coastal prairies, feeding Lake Conroe, which recharges the underlying Gulf Coast Aquifer. This aquifer comprises Tertiary and Quaternary sands, clays, and lignitic shales from the Jackson and Yegua groups, with calcareous zones from the Chicot and Evangeline aquifer formations adding minerals. Bicarbonate leaching from these sedimentary layers elevates calcium and magnesium content, imparting a moderately mineralised character without the extreme concentrations seen in pure karst systems.

Moderately hard water promotes limescale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Faucet aerators and showerheads may clog, raising energy bills. Regular vinegar descaling, scale-inhibiting filters, or a whole-home softener is recommended to mitigate spotting on dishes and dry skin effects. The City of Conroe earns a quality score of 80/100 per recent reports, with good overall compliance but 2 contaminants above EPA health guidelines noted in past tests; treatment involves coagulation, sedimentation, filtration, and chloramine disinfection at the surface plant, with groundwater aerated and chlorinated.

Geology & Source: Lake Conroe / West Fork San Jacinto watershed; Gulf Coast Aquifer (Chicot and Evangeline aquifers) — Tertiary/Quaternary sands with limestone and dolomite interbeds contribute calcium and magnesium, producing moderate hardness

Other Texas Water Reports

The Woodlands

≈ 120–179 mg/L

🟠 Hard

Spring

≈ 120–179 mg/L

🟠 Hard

Tomball

≈ 120–179 mg/L

🟠 Hard

New Caney

≈ 120–179 mg/L

🟠 Hard

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

Frequently Asked Questions

Is Conroe's water safe to drink?

Yes. Conroe'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 Conroe?

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

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