Water Hardness in 33703
Saint Petersburg, Florida · Pinellas County
Dataset updated March 9, 2026Matched to 9 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 9 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.
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 Serving 33703
These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.
| 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 |
Nearby Zip Codes
What This Means For You
Use this ZIP 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 Petersburg, FL (33703).
Frequently Asked Questions
Is the water hard in Saint Petersburg, FL (33703)?
The average water hardness in 33703 is 178 PPM (10.4 GPG), which is classified as moderately hard.
Do I need a water softener in 33703?
With hardness of 178 PPM, a water softener is worth considering for homes in 33703.
Is hard water in 33703 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 33703?
Zip code 33703 in Saint Petersburg, Florida is served by 9 water systems.
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