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

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

Windsor Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.3

neutral = 7.0

Lead

0.003 mg/L

✓ Below action level

TDS

208 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 Windsor, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Windsor	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 Windsor compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Windsor, Connecticut	≈ 120–179 mg/L	6.8 ppt	🟠 Hard	groundwater
South Windsor, Connecticut	≈ 0–60 mg/L	6.8 ppt	🟢 Soft	groundwater
East Hartford, Connecticut	≈ 0–60 mg/L	7.9 ppt	🟢 Soft	groundwater
Windsor Locks, Connecticut	≈ 120–179 mg/L	6.8 ppt	🟠 Hard	reservoir
Bloomfield, Connecticut	≈ 120–179 mg/L	8.4 ppt	🟠 Hard	groundwater

National Benchmark

How Windsor compares to the USA average

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

Local geology and source profile

Source: GroundwaterTDS: 208 mg/LpH: 7.3

Windsor, Connecticut is served by The Metropolitan District (MDC), a regional water utility providing drinking water to multiple communities in the Hartford area. The MDC's water supply originates entirely from surface water sources: the East Branch of the Farmington River and the Nepaug River (a tributary of the Farmington River). Water is stored in two major reservoirs—the Barkhamsted Reservoir (30-billion-gallon capacity, impounded by the Saville Dam) and the Nepaug Reservoir (9-billion-gallon capacity, created by the Phelps Brook and Nepaug Dams)—both located in Connecticut's northwest hills approximately 20 miles from Hartford. The MDC Laboratory oversees water quality monitoring and can be reached at (860) 278-7850 ext. 3901.

Windsor's water supply is drawn from a watershed covering approximately 89.7 square miles in the Farmington River basin. The region's geology—characterized by glacially-derived soils and New England bedrock formations—contributes to elevated mineral content in the water. This geological setting produces a hard water supply typical of the Connecticut region, where mineral-rich groundwater and surface runoff combine to increase dissolved calcium and magnesium concentrations.

The hard water supply in Windsor requires attention to household maintenance and appliance longevity. Scale buildup accumulates in pipes, water heaters, and appliances such as dishwashers and washing machines, reducing their efficiency and lifespan. Residents may notice reduced soap effectiveness, spotting on glassware, and increased detergent consumption. Water softeners are commonly recommended to mitigate these effects and protect plumbing infrastructure. The MDC meets all federal legal limits for drinking water contaminants; in 2023, the MDC completed EPA-required UCMR testing for 29 different PFAS compounds and detected none in its water supply. However, third-party testing has identified elevated Total Trihalomethanes (TTHMs), disinfection byproducts formed during chlorination that remain below EPA legal limits but may warrant attention.

Geology & Source: Farmington River basin, NW Connecticut; glacially-derived soils and New England bedrock — elevated mineral content from glacial deposits and bedrock formations produces hard water characteristic of the region

Other Connecticut Water Reports

South Windsor

≈ 0–60 mg/L

🟢 Soft

East Hartford

≈ 0–60 mg/L

🟢 Soft

Windsor Locks

≈ 120–179 mg/L

🟠 Hard

Bloomfield

≈ 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 Windsor's water safe to drink?

Yes. Windsor'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 Windsor?

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

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