Needham Water Hardness & Quality Report (2026)
Water Hardness
4.2 grains per gallon
Source
reservoir
pH Level
7.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
43 mg/L
Est. Daily Cost
$0.19
energy & soap waste
Source: See methodology section below · Updated 2026
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 Needham, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Needham | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.2 yrs | 8.5 yrs | -15% |
| Washing Machine | 11 yrs | 12 yrs | -8% |
| Water Heater | 12.7 yrs | 15 yrs | -15% |
Regional Water Comparison
How Needham compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Needham, Massachusetts | 71.5 mg/L | 13.6 ppt | 🟡 Moderately Hard | reservoir |
| Newton, Massachusetts | ≈ 0–60 mg/L | 0 ppt | 🟢 Soft | reservoir |
| Wellesley, Massachusetts | ≈ 120–179 mg/L | 82.5 ppt | 🟠 Hard | reservoir |
| Westwood, Massachusetts | ≈ 120–179 mg/L | 9.4 ppt | 🟠 Hard | reservoir |
| Newtonville, Massachusetts | ≈ 0–60 mg/L | 0 ppt | 🟢 Soft | reservoir |
National Benchmark
How Needham compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Needham | 71.5 mg/L | 🟡 Low |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Needham's Water Unique?
Local geology and source profile
Needham Water Department serves the town of Needham, Massachusetts (Norfolk County), drawing primarily from the Needham Wellfield—a network of municipal wells tapping local groundwater aquifers. The utility is also interconnected to the Massachusetts Water Resources Authority (MWRA) system, providing supplemental supply from the Quabbin Reservoir watershed. This dual-source arrangement provides resilience and year-round reliability. Water undergoes rigorous testing from the wellfield through treatment prior to distribution to homes and businesses across the town's service area.
The Needham water supply originates from glacial outwash and bedrock aquifers within the Boston Basin, underlain by Precambrian metamorphic basement rocks and Paleozoic sedimentary formations. As groundwater travels through these geological layers, it naturally dissolves calcium and magnesium minerals, imparting a moderately mineralised character to the supply. The dual-source arrangement—local wells supplemented by MWRA surface water—reflects the regional hydrogeology of the greater Boston area.
Needham's moderately soft water creates minimal scale buildup but may cause some mineral accumulation in appliances such as water heaters and dishwashers over time. Residents may notice white deposits on faucets and shower heads. Water softening treatment is generally unnecessary but may benefit those sensitive to hardness effects. Regular descaling of appliances and use of water-softening additives in laundry can mitigate practical impacts. According to 2022 testing, lead and copper levels were below the action level in all homes tested, with no violations for other regulated substances, and the water is classified as very safe by the utility.
Geology & Source: Boston Basin glacial outwash and bedrock aquifers; Precambrian metamorphic rocks and Paleozoic sediments dissolve calcium and magnesium — moderately soft supply; supplemented by MWRA Quabbin Reservoir watershed
Other Massachusetts Water Reports
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Frequently Asked Questions
Is Needham's water safe to drink?
Do I need a water softener in Needham?
How does Needham compare to the USA average?
Data Sources & Methodology
Water quality data for Needham is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
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.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
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.
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.
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.
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.