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

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

Pueblo Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.3

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

600 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 Pueblo, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Pueblo	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 Pueblo compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Pueblo, Colorado	≈ 180+ mg/L	0 ppt	🔴 Very Hard	reservoir
Pueblo West, Colorado	≈ 180+ mg/L	0 ppt	🔴 Very Hard	reservoir
Fountain, Colorado	≈ 120–179 mg/L	863.5 ppt	🟠 Hard	reservoir
Security-Widefield, Colorado	≈ 120–179 mg/L	4.9 ppt	🟠 Hard	reservoir
Fort Carson, Colorado	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir

National Benchmark

How Pueblo compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 600 mg/LpH: 8.3

Pueblo Water Department operates the Whitlock water treatment plant, serving Pueblo County in south-central Colorado. The utility draws surface water from the Arkansas River system, conveying it through Pueblo Reservoir before treatment and distribution via pump stations and storage tanks to residential and commercial customers throughout the service area. The Whitlock plant employs conventional treatment including coagulation, sedimentation, filtration, and disinfection. Treated water meets all federal Safe Drinking Water Act standards, and the utility monitors for lead and copper compliance while publishing detailed water quality data.

The Arkansas River watershed originates in the Colorado Rocky Mountains and flows through Cretaceous sedimentary rocks and carbonate deposits typical of the Arkansas River basin. As water moves through limestone and dolomite-rich soils and bedrock, it dissolves substantial quantities of calcium and magnesium, producing a very hard water supply. Hardness varies seasonally: lower in summer when snowmelt dilutes mineral concentration, and significantly higher in winter months when groundwater contributions dominate.

Very hard water in Pueblo causes pronounced scaling in water heaters, kettles, and dishwashers, reduces soap and detergent effectiveness, and leaves spotty residue on glassware and fixtures. Residents and businesses are strongly advised to install water softening systems for whole-house protection. Regular descaling and use of chelating agents in cleaning products help mitigate mineral buildup. Haloacetic acids (HAA5) have been detected as a disinfection byproduct but remain below regulatory limits. Consumers with specific concerns may contact the Water Quality Supervisor at 719-584-0467.

Geology & Source: Arkansas River basin — Cretaceous sedimentary formations and carbonate-rich strata; limestone and dolomite dissolution yields very hard water, most pronounced in winter when snowmelt dilution is minimal

Other Colorado Water Reports

Pueblo West

≈ 180+ mg/L

🔴 Very Hard

Fountain

≈ 120–179 mg/L

🟠 Hard

Security-Widefield

≈ 120–179 mg/L

🟠 Hard

Fort Carson

≈ 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 Pueblo's water safe to drink?

Yes. Pueblo'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 Pueblo?

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

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