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

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

Golden Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

5.7

neutral = 7.0

Lead

0.001 mg/L

✓ Below action level

TDS

1 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 Golden, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Golden	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 Golden compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Golden, Colorado	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Arvada, Colorado	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Wheat Ridge, Colorado	≈ 120–179 mg/L	2.3 ppt	🟠 Hard	reservoir
Lakewood, Colorado	≈ 120–179 mg/L	11.3 ppt	🟠 Hard	reservoir
Dakota Ridge, Colorado	≈ 0–60 mg/L	2.1 ppt	🟢 Soft	reservoir

National Benchmark

How Golden compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 1 mg/LpH: 5.7

The City of Golden Water Utility (operating as GOLDEN CITY OF) serves approximately 21,000 residents in Golden, Jefferson County, Colorado. Primary sources include surface water from Clear Creek and the South Platte River basin, supplemented by local reservoirs and shallow alluvial groundwater. The utility earned an 'A' grade for EPA compliance in its 2026 water quality reporting and can be reached at 303-384-8182 or 1445 10th St, Golden, CO 80401.

The supply originates in the Front Range watersheds of Clear Creek and the upper South Platte River, traversing Precambrian granite, gneiss, and schist of the Colorado Mineral Belt, with overlying Pleistocene glacial deposits and Tertiary gravel aquifers. Natural dissolution of calcium- and magnesium-bearing minerals from fractured bedrock imparts a moderately mineralised character typical of mountain-front alluvial systems without heavy limestone influence.

Moderately hard water in Golden leads to moderate scale buildup in pipes, water heaters, dishwashers, and washing machines, with estimates suggesting significant annual costs to appliances and plumbing if left untreated. Faucets may develop spotting and heater efficiency can decline. Regular vinegar descaling, biannual water heater flushing, and sediment filters help mitigate issues; a water softener is recommended to extend appliance life. The water meets federal EPA legal limits but scores a 'C' against health guidelines, with 8 contaminants — including bromodichloromethane, bromoform, chloroform, chromium (hexavalent), dibromochloromethane, dichloroacetic acid, nitrate, and total trihalomethanes (TTHMs) — exceeding independent recommendations; total dissolved solids measure 172 ppm.

Geology & Source: Front Range watersheds traverse Precambrian granite, gneiss, and schist of the Colorado Mineral Belt with overlying Pleistocene glacial deposits and Tertiary gravel aquifers; natural dissolution from fractured crystalline rocks produces moderately

Other Colorado Water Reports

Arvada

≈ 120–179 mg/L

🟠 Hard

Wheat Ridge

≈ 120–179 mg/L

🟠 Hard

Lakewood

≈ 120–179 mg/L

🟠 Hard

Dakota Ridge

≈ 0–60 mg/L

🟢 Soft

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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 Golden's water safe to drink?

Yes. Golden'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 Golden?

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

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