Water Hardness in Saint Johnsbury, VT
Vermont · 1 zip codes · 4 matched water systems
Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Saint Johnsbury, VT Water Hard or Soft?
The citywide weighted average water hardness in Saint Johnsbury, VT is 141 PPM (8.2 GPG), classified as moderately hard. Individual systems, ZIP codes, and private wells can differ.
Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.
How this city reading is built
This city reading is a weighted rollup across 4 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems in Saint Johnsbury
These systems are matched to Saint Johnsbury, VT. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| St Johnsbury Water System VT0005045 | surface water | 141 PPM Moderately Hard | |
| Passumpsic Fire District 1 VT0005031 | surface water | 141 PPM Moderately Hard | |
| Shattuck Hill Mhp VT0020737 | surface water | 141 PPM Moderately Hard | |
| West Burke Housing VT0005555 | groundwater | 96 PPM Slightly Hard |
Zip Codes in Saint Johnsbury, VT
What This Means For You
Use this city reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Saint Johnsbury, VT.
Frequently Asked Questions
How hard is the water in Saint Johnsbury, VT?
The citywide weighted average water hardness in Saint Johnsbury, VT is 141 PPM (8.2 GPG), classified as moderately hard. This is based on 4 matched water systems.
Do I need a water softener in Saint Johnsbury, VT?
With a citywide average hardness of 141 PPM, a water softener is worth considering for homes in Saint Johnsbury. Confirm your tap reading before sizing equipment.
Is hard water in Saint Johnsbury, VT safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve Saint Johnsbury, VT?
Saint Johnsbury, Vermont is served by 4 matched water systems across 1 zip code.
Learn More About Your Water
How to Test Water Hardness at Home
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10 min readPPM to GPG Converter + Water Hardness Scale Explained
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