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

The USA national average is 151 mg/L. Cranston (≈ 0–59 mg/L) is 121 mg/L softer than average.

Cranston Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

Source

reservoir

pH Level

6.9

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

190 mg/L

Est. Daily Cost

$0.08

energy & soap waste

Source: See methodology section below · Updated 2026

soft~0–59 mg/LSoft · 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 Cranston, your appliances are currently losing 4% efficiency due to mineral buildup.

Appliance	In Cranston	Soft Water City	Efficiency Loss
Kettle	8.2 yrs	8.5 yrs	-4%
Washing Machine	11.5 yrs	12 yrs	-4%
Water Heater	14.4 yrs	15 yrs	-4%

Regional Water Comparison

How Cranston compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Cranston, Rhode Island	≈ 0–59 mg/L	9.8 ppt	🟢 Soft	reservoir
Providence, Rhode Island	≈ 0–60 mg/L	0 ppt	🟢 Soft	reservoir
East Providence, Rhode Island	≈ 0–60 mg/L	0 ppt	🟢 Soft	reservoir
North Providence, Rhode Island	≈ 0–60 mg/L	8.4 ppt	🟢 Soft	reservoir
Johnston, Rhode Island	≈ 0–60 mg/L	3.9 ppt	🟢 Soft	reservoir

National Benchmark

How Cranston compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Cranston	≈ 0–59 mg/L	🟢 None
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Cranston's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 190 mg/LpH: 6.9

Cranston Water Department serves the city of Cranston in Providence County, Rhode Island. The utility sources water from multiple supplies, with Cranston purchasing a portion from Providence Water, the state's largest supplier. Treatment and distribution infrastructure maintains compliance with federal and state Safe Drinking Water Act standards, serving residential, commercial, and industrial customers throughout the city.

Cranston's water originates from sources shaped by Rhode Island's glaciated landscape. The region sits atop Precambrian metamorphic bedrock overlain by Quaternary glacial deposits and marine sediments. Coastal and lowland areas contain pockets of carbonate and other soluble rock formations that can elevate mineral content in some Rhode Island supplies, but Cranston's overall water character remains soft due to limited mineral dissolution in its primary source aquifers and treatment processes.

At soft hardness levels, Cranston residents experience minimal scaling in appliances and plumbing systems. Water heaters, dishwashers, and washing machines operate efficiently without significant mineral buildup, and soap and detergents lather readily, reducing cleaning product consumption. Most households do not require water softening systems. The Cranston Water Department maintains turbidity well below regulatory limits — 2023 data shows average turbidity below 0.10 NTU — and sodium is monitored as an unregulated contaminant. Residents with specific concerns should consult the utility's annual Consumer Confidence Report for detailed water quality data.

Geology & Source: Rhode Island glaciated terrain — Precambrian metamorphic bedrock overlain by Quaternary glacial deposits and marine sediments; limited carbonate dissolution in primary source aquifers produces soft water

Other Rhode Island Water Reports

Providence

≈ 0–60 mg/L

🟢 Soft

East Providence

≈ 0–60 mg/L

🟢 Soft

North Providence

≈ 0–60 mg/L

🟢 Soft

Johnston

≈ 0–60 mg/L

🟢 Soft

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 Cranston's water safe to drink?

Yes. Cranston's water meets all federal safety standards. The hardness is ≈ 0–59 mg/L (Soft), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Cranston?

Cranston's water is soft at ≈ 0–59 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.

How does Cranston compare to the USA average?

The USA national average is 151 mg/L. Cranston (≈ 0–59 mg/L) is 121 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 Cranston 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.