Water Hardness in Sullivan, MO
Missouri · 1 zip codes · 12 matched water systems
Dataset updated March 9, 202612 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Sullivan, MO Water Hard or Soft?
The citywide weighted average water hardness in Sullivan, MO is 136 PPM (8 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 12 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 Sullivan
These systems are matched to Sullivan, MO. 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 |
|---|---|---|---|
| Washington Pws MO6010838 | groundwater | 122 PPM Moderately Hard | |
| Union Pws MO6010801 | groundwater | 122 PPM Moderately Hard | |
| Sullivan Pws MO6010775 | groundwater | 180 PPM Hard | |
| Oak Grove Village Pws MO6010590 | groundwater | 180 PPM Hard | |
| Village Of West Sullivan Pws MO4011491 | groundwater | 180 PPM Hard |
Zip Codes in Sullivan, MO
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 Sullivan, MO.
Frequently Asked Questions
How hard is the water in Sullivan, MO?
The citywide weighted average water hardness in Sullivan, MO is 136 PPM (8 GPG), classified as moderately hard. This is based on 12 matched water systems.
Do I need a water softener in Sullivan, MO?
With a citywide average hardness of 136 PPM, a water softener is worth considering for homes in Sullivan. Confirm your tap reading before sizing equipment.
Is hard water in Sullivan, MO 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 Sullivan, MO?
Sullivan, Missouri is served by 12 matched water systems across 1 zip code.
Learn More About Your Water
How to Test Water Hardness at Home
Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.
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10 min readPPM to GPG Converter + Water Hardness Scale Explained
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