Water Hardness in Vermont
Across 9 measured cities — with 70 more covered by labeled county-level estimates — Vermont's median tap water hardness is 66.9 mg/L (3.9 gpg): moderately hard on the USGS scale. Below: every covered city, the state's hardest and softest water, and the geology that explains it.
Data updated September 13, 2026. Sources: utility-reported water quality data and USGS/EPA Water Quality Portal samples.
What it costs to soften Vermont water
Water softener cost in Vermont at 3.9 gpg prices the equipment and the installation labour against the plumber wages published for Vermont, and labels every range as modelled or measured rather than leaving you to guess which it is.
Vermont · 3.91 grains per gallon
$948–$1,217
installed, midpoint $1,068 — a 24,000-grain unit, the size 4 people at this hardness need.
Salt and drain water over 10 years: $541–$1,152 — the 4,281,450 grains of hardness this household removes, at the national salt price and water rate whose sources are named below. Filter changes and Service contract are omitted rather than assumed.
Sized for 4 people regenerating every 7 days: 8,211 grains of capacity needed, rounded up to the next common residential size. The median of 9 measured Vermont cities in our hardness dataset. Modelled: the standard build band published for that state at the size this hardness calls for, equipment priced 2026-10-04 against the May 2025 reference period (OEWS M2025). Salt: the median retailer price of 3 retailers, read 2026-10-04, at a declared salt dose per regeneration. Drain water: about 50 gallons per regeneration from a government extension estimate read 2026-10-04, at the 2024 national average water and sewer rate from a government source read 2026-10-04.
Deciding whether it is worth it at all? Start from how much a water softener costs nationally — the same equipment, installation and ten-year ownership breakdown before any state wage adjustment is applied.
Vermont Cities by Hardness Category
Measured cities only — labeled county estimates never enter the category counts or the median.
| Category | Range | Measured cities | Share |
|---|---|---|---|
| Soft | 0-60 mg/L | 2 | 22.2% |
| Moderately hard | 60-120 mg/L | 5 | 55.6% |
| Hard | 120-180 mg/L | 1 | 11.1% |
| Very hard | >180 mg/L | 1 | 11.1% |
Hardest and Softest Water in Vermont
Measured values only; labeled county estimates and values under active dispute never rank.
Hardest water in Vermont
- Pownal — 272.0 mg/L (15.9 gpg), very hard
- Montpelier — 101.0 mg/L (5.9 gpg), moderately hard
- South Burlington — 66.9 mg/L (3.9 gpg), moderately hard
- Winooski — 62.2 mg/L (3.6 gpg), moderately hard
- Burlington — 62.0 mg/L (3.6 gpg), moderately hard
Softest water in Vermont
- Ludlow — 13.7 mg/L (0.8 gpg), soft
- Barre — 59.9 mg/L (3.5 gpg), soft
- Burlington — 62.0 mg/L (3.6 gpg), moderately hard
- Winooski — 62.2 mg/L (3.6 gpg), moderately hard
- South Burlington — 66.9 mg/L (3.9 gpg), moderately hard
Every Covered City in Vermont
All 79 covered Vermont cities, sorted by population served. "County estimate" rows are labeled context values from USGS/EPA Water Quality Portal county sampling — they never enter the median above. City names link to each city's full water quality page.
| City | Hardness (mg/L) | gpg | Category | Data |
|---|---|---|---|---|
| Burlington | 62.0 | 3.6 | Moderately hard | Utility-reported |
| Rutland | 66.1 | 3.9 | Moderately hard | County estimate |
| South Burlington | 66.9 | 3.9 | Moderately hard | Utility-reported |
| Essex Junction | 111.0 | 6.5 | Moderately hard | County estimate |
| Bennington | 4.4 | 0.3 | Soft | County estimate |
| Barre | 59.9 | 3.5 | Soft | Computed from Ca+Mg |
| Brattleboro | 4.5 | 0.3 | Soft | County estimate |
| Middlebury | 61.3 | 3.6 | Moderately hard | County estimate |
| Springfield | 32.4 | 1.9 | Soft | County estimate |
| Montpelier | 101.0 | 5.9 | Moderately hard | Utility-reported |
| Winooski | 62.2 | 3.6 | Moderately hard | Utility-reported |
| Milton | 111.0 | 6.5 | Moderately hard | County estimate |
| Shelburne | 111.0 | 6.5 | Moderately hard | County estimate |
| Vergennes | 61.3 | 3.6 | Moderately hard | County estimate |
| Concord | 12.8 | 0.8 | Soft | County estimate |
| Stowe | 12.4 | 0.7 | Soft | County estimate |
| Bellows Falls | 4.5 | 0.3 | Soft | County estimate |
| Brandon | 66.1 | 3.9 | Moderately hard | County estimate |
| Bridport | 61.3 | 3.6 | Moderately hard | County estimate |
| Cambridge | 12.4 | 0.7 | Soft | County estimate |
| Fair Haven | 66.1 | 3.9 | Moderately hard | County estimate |
| Richford | 45.3 | 2.6 | Soft | County estimate |
| Jeffersonville | 12.4 | 0.7 | Soft | County estimate |
| Ludlow | 13.7 | 0.8 | Soft | Computed from Ca+Mg |
| Hinesburg | 111.0 | 6.5 | Moderately hard | County estimate |
| Randolph | 87.4 | 5.1 | Moderately hard | County estimate |
| Woodstock | 32.4 | 1.9 | Soft | County estimate |
| Poultney | 66.1 | 3.9 | Moderately hard | County estimate |
| Warren | 56.2 | 3.3 | Soft | County estimate |
| West Rutland | 66.1 | 3.9 | Moderately hard | County estimate |
| Windsor | 32.4 | 1.9 | Soft | County estimate |
| Bristol | 61.3 | 3.6 | Moderately hard | County estimate |
| Proctor | 162.0 | 9.5 | Hard | Utility-reported |
| Castleton | 100.0 | 5.8 | Moderately hard | Utility-reported |
| Bethel | 32.4 | 1.9 | Soft | County estimate |
| South Royalton | 32.4 | 1.9 | Soft | County estimate |
| Pittsford | 66.1 | 3.9 | Moderately hard | County estimate |
| Hardwick | 73.8 | 4.3 | Moderately hard | County estimate |
| Enosburg Falls | 45.3 | 2.6 | Soft | County estimate |
| Island Pond | 12.8 | 0.8 | Soft | County estimate |
| North Bennington | 4.4 | 0.3 | Soft | County estimate |
| Fairfax | 45.3 | 2.6 | Soft | County estimate |
| Grand Isle | 59.4 | 3.5 | Soft | County estimate |
| Bradford | 87.4 | 5.1 | Moderately hard | County estimate |
| Jericho | 111.0 | 6.5 | Moderately hard | County estimate |
| Derby | 52.4 | 3.1 | Soft | County estimate |
| Wilmington | 4.5 | 0.3 | Soft | County estimate |
| Johnson | 12.4 | 0.7 | Soft | County estimate |
| Putney | 4.5 | 0.3 | Soft | County estimate |
| Randolph Center | 87.4 | 5.1 | Moderately hard | County estimate |
| Richmond | 111.0 | 6.5 | Moderately hard | County estimate |
| Williamstown | 87.4 | 5.1 | Moderately hard | County estimate |
| Cavendish | 32.4 | 1.9 | Soft | County estimate |
| Shaftsbury | 4.4 | 0.3 | Soft | County estimate |
| Stamford | 4.4 | 0.3 | Soft | County estimate |
| North Troy | 52.4 | 3.1 | Soft | County estimate |
| Hyde Park | 12.4 | 0.7 | Soft | County estimate |
| Williston | 111.0 | 6.5 | Moderately hard | County estimate |
| Killington | 66.1 | 3.9 | Moderately hard | County estimate |
| Bomoseen | 66.1 | 3.9 | Moderately hard | County estimate |
| Bakersfield | 45.3 | 2.6 | Soft | County estimate |
| Center Rutland | 66.1 | 3.9 | Moderately hard | County estimate |
| Pownal | 272.0 | 15.9 | Very hard | Utility-reported |
| Graniteville | 87.4 | 5.1 | Moderately hard | County estimate |
| Websterville | 56.2 | 3.3 | Soft | County estimate |
| Starksboro | 61.3 | 3.6 | Moderately hard | County estimate |
| Saxtons River | 4.5 | 0.3 | Soft | County estimate |
| East Fairfield | 45.3 | 2.6 | Soft | County estimate |
| Chester | 32.4 | 1.9 | Soft | County estimate |
| Westfield | 52.4 | 3.1 | Soft | County estimate |
| Charlotte | 111.0 | 6.5 | Moderately hard | County estimate |
| Arlington | 4.4 | 0.3 | Soft | County estimate |
| Westford | 111.0 | 6.5 | Moderately hard | County estimate |
| Bridgewater | 32.4 | 1.9 | Soft | County estimate |
| Morrisville | 12.4 | 0.7 | Soft | County estimate |
| North Hero | 59.4 | 3.5 | Soft | County estimate |
| Plainfield | 56.2 | 3.3 | Soft | County estimate |
| West Dover | 4.5 | 0.3 | Soft | County estimate |
| Whitingham | 4.5 | 0.3 | Soft | County estimate |
Above 120 mg/L (7 gpg), scale is usually worth treating — see our water softener guide, or size a system with the hardness calculator & converter.
The Geology Behind Vermont's Water Hardness
Vermont sits in the New England crystalline uplands region.
New England sits on granite, gneiss, and schist - crystalline bedrock with almost no carbonate minerals for water to dissolve. Ample rain and snowmelt move quickly through thin, glacially scoured soils into rivers and upland reservoirs without picking up much calcium or magnesium. That is why the USGS maps this region among the softest water in the country.
Vermont Water Hardness FAQ
Does Vermont have hard water?
On the whole, no — Vermont's statewide median sits below the hard threshold, though some cities run harder. The median is 66.9 mg/L (3.9 gpg) — moderately hard on the USGS scale, where anything above 120 mg/L (7 gpg) counts as hard. 2 of Vermont's 9 measured cities fall in the hard or very hard bands (22%), so check your own city rather than the state average.
How hard is tap water in Vermont?
Across the 9 Vermont cities with measured values in our index, the median hardness is 66.9 mg/L (3.9 gpg) — moderately hard on the USGS scale. Individual cities range from 13.7 to 272.0 mg/L, so check your own city rather than assuming the state number.
Which city in Vermont has the hardest water?
Pownal has the hardest measured tap water in our Vermont index at 272.0 mg/L (15.9 gpg) — very hard on the USGS scale. Rankings use measured utility values only; labeled county estimates and values under active dispute are excluded.
Do I need a water softener in Vermont?
2 of Vermont's 9 measured cities (22%) fall in the hard or very hard bands — above 120 mg/L (7 gpg), the level where most water treatment professionals suggest considering an ion-exchange softener. Hardness varies utility to utility, so look up your own city's value before sizing equipment.
How do I find my city's exact water hardness?
Enter your ZIP code in our free lookup at tapwaterdata.com/zip to see the value we hold for your Vermont city from utility-reported water quality data, check your water utility's annual Consumer Confidence Report (CCR), or use a home test-strip kit.
Need whole-house or professional water treatment?
For the problems a pitcher or under-sink filter cannot fix — scale, rust and black staining, sulfur smell, well contamination, or test results you cannot explain. Tell us what is happening and we will connect you with a local water-treatment professional.
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