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

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

Weston Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

Source

reservoir

pH Level

7.3

neutral = 7.0

Lead

0.006 mg/L

✓ Below action level

TDS

167 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 Weston, your appliances are currently losing 4% efficiency due to mineral buildup.

Appliance	In Weston	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 Weston compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Weston, Massachusetts	≈ 0–59 mg/L	0 ppt	🟢 Soft	reservoir
Wayland, Massachusetts	≈ 120–179 mg/L	63 ppt	🟠 Hard	groundwater
Waltham, Massachusetts	≈ 0–60 mg/L	0 ppt	🟢 Soft	reservoir
Wellesley, Massachusetts	≈ 120–179 mg/L	82.5 ppt	🟠 Hard	reservoir
Natick, Massachusetts	≈ 120–179 mg/L	147.7 ppt	🟠 Hard	groundwater

National Benchmark

How Weston compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 167 mg/LpH: 7.3

The Town of Weston Department of Public Works, operating as the Weston Water Department, supplies its approximately 12,000 residents with water through the Massachusetts Water Resources Authority (MWRA) system. This supply originates from the Quabbin Reservoir and Wachusett Reservoir, major surface impoundments located in central Massachusetts. Water is treated at the John J. Carroll Water Treatment Plant in Marlborough, MA, before being distributed to Weston via local mains and the MWRA's metropolitan tunnel system.

The geology beneath Weston is characterized by ancient, resistant igneous and metamorphic rocks belonging to the Appalachian orogenic belt. These formations, including gneiss and schist, contain minimal limestone or dolomite. Because the surface water interacts only briefly with these inert bedrock types and glacial till, it leaches very few minerals. This geological makeup is why Weston's water is classified as very soft, with low overall mineral content.

Because Weston's water is so soft, homeowners rarely encounter issues with scale buildup in appliances like water heaters, dishwashers, or coffee makers. You'll find that soap lathers easily, and there's no need for a water softener. Instead of worrying about descaling, the focus for maintenance is on preventing pipe corrosion. The MWRA monitors for lead and copper, reporting compliance with EPA standards. While the water meets primary drinking water standards, some residents opt for filters to address aesthetic concerns or potential traces of PFAS, though all detected contaminants are below regulatory action levels.

Geology & Source: New England Upland province; granitic and metamorphic bedrock (gneiss, schist) yield very soft water

Other Massachusetts Water Reports

Wayland

≈ 120–179 mg/L

🟠 Hard

Waltham

≈ 0–60 mg/L

🟢 Soft

Wellesley

≈ 120–179 mg/L

🟠 Hard

Natick

≈ 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 Weston's water safe to drink?

Yes. Weston'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 Weston?

Weston'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 Weston compare to the USA average?

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