Water Hardness in Largo, FL
Florida · 7 zip codes · 13 matched water systems
City avg (weighted): 178 PPM
Dataset updated March 9, 202613 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Largo, FL Water Hard or Soft?
The displayed hardness for Largo, FL is 178 PPM (10.4 GPG) from Pinellas County Utilities, classified as moderately hard. The citywide weighted average is 178 PPM.
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 13 matched water systems and 7 ZIP codes. 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 Largo
These systems are matched to Largo, FL. 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 |
|---|---|---|---|
| Pinellas County Utilities FL6521405 | surface water | 178 PPM Moderately HardUSGS estimate: 110 PPM | |
| St Petersburg, City Of FL6521715 | surface water | 178 PPM Moderately HardUSGS estimate: 110 PPM | |
| Clearwater Water System FL6520336 | groundwater | 178 PPM Moderately HardUSGS estimate: 398 PPM | |
| Pinellas Park Water Dept FL6521406 | surface water | 178 PPM Moderately HardUSGS estimate: 110 PPM | |
| Dunedin Water System FL6520486 | groundwater | 178 PPM Moderately HardUSGS estimate: 398 PPM |
Zip Codes in Largo, FL
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 Largo, FL.
Frequently Asked Questions
How hard is the water in Largo, FL?
The citywide weighted average water hardness in Largo, FL is 178 PPM (10.4 GPG), classified as moderately hard. This is based on 13 matched water systems.
Do I need a water softener in Largo, FL?
With a citywide average hardness of 178 PPM, a water softener is worth considering for homes in Largo. Confirm your tap reading before sizing equipment.
Is hard water in Largo, FL 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 Largo, FL?
Largo, Florida is served by 13 matched water systems across 7 zip codes.
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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