Salem Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
reservoir
pH Level
7.6
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
162.7 mg/L
Est. Daily Cost
$0.40
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 Salem, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Salem | 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 Salem compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Salem, New Hampshire | ≈ 120–179 mg/L | 72.2 ppt | 🟠 Hard | reservoir |
| Methuen, Massachusetts | ≈ 0–60 mg/L | 19 ppt | 🟢 Soft | reservoir |
| Lawrence, Massachusetts | ≈ 0–60 mg/L | 6.1 ppt | 🟢 Soft | reservoir |
| Windham, New Hampshire | ≈ 120–179 mg/L | 7.7 ppt | 🟠 Hard | groundwater |
| North Andover, Massachusetts | ≈ 0–60 mg/L | 0 ppt | 🟢 Soft | reservoir |
National Benchmark
How Salem compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Salem | ≈ 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 Salem's Water Unique?
Local geology and source profile
Salem Municipal Services Utilities Division supplies water to approximately 30,000 people in Salem, NH, Rockingham County. Primary sources include Canobie Lake, which supplied 104 million gallons directly in 2023, supplemented by 187 million gallons purchased from Manchester Water Works through the Southern NH Regional Water Line. Treatment is managed by the Utilities Division, with distribution serving Salem and nearby Atkinson. The utility maintains compliance with EPA standards as confirmed in the 2023 Water Quality Report.
The Merrimack River watershed encompasses Canobie Lake and upstream sources such as Pennichuck Pond, influencing Salem's supply. Underlying geology consists of Paleozoic bedrock from the Merrimack Belt, featuring metamorphosed sediments of the Littleton Formation (schist and quartzite) and Merrimack Group (argillite and graywacke), overlain by Quaternary glacial till and stratified drift. This combination of carbonate-influenced sediments and glacial deposits elevates calcium and magnesium content, imparting a moderately mineralised to hard water character.
Hard water leads to scale buildup in water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Soap scum on fixtures, spots on glassware, and drier skin or hair are common effects. Regular appliance deliming and vinegar cleaning help manage deposits; a water softener is recommended to mitigate these effects and extend equipment life. The 2023 Consumer Confidence Report confirms full compliance with EPA MCLs and MCLGs, with no violations noted; occasional discoloration from iron mineral deposits occurred in 2023 but was deemed safe. Treatment includes conventional filtration and disinfection.
Geology & Source: Merrimack River watershed — Canobie Lake and Manchester Water Works supply; Carboniferous Littleton Formation (schist, quartzite) and Merrimack Group (argillite, graywacke) with Quaternary glacial till; carbonate mineral contributions produce hard
Other New Hampshire Water Reports
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Frequently Asked Questions
Is Salem's water safe to drink?
Do I need a water softener in Salem?
How does Salem compare to the USA average?
Data Sources & Methodology
Water quality data for Salem 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.