Service areas / Tampa Bay / St. Petersburg
Water softeners and filtration in St. Petersburg, FL
How hard is St. Petersburg water?
Hardness reported by City of St. Petersburg Water Resources: 158 mg/L, average of monthly samples (Calendar year 2025).
Hard City of St. Petersburg Water Resources's figures for St. Petersburg read as hard on the USGS scale.
SoftMod.HardVery hard
Source: 2025 Water Quality Report (City of St. Petersburg). Sources last checked October 28, 2026.
St. Petersburg, FL water at a glance
- Water utility
- City of St. Petersburg Water Resources
- Published hardness
- 158 mg/L, about 9.2 grains per gallon, hard on the USGS scale (source)
- Sources last checked
- October 28, 2026
Who you are working with. My Home Water System connects homeowners with [dealer to be named]. The dealer provides your estimate, contract, installation and ongoing service.
What does City of St. Petersburg Water Resources publish about St. Petersburg water?
St. Petersburg buys its water from Tampa Bay Water, which blends groundwater, surface water and desalinated seawater.
| Measure | As published | Period | Source |
|---|---|---|---|
| Hardness | 158 mg/L, average of monthly samples | Calendar year 2025 | 2025 Water Quality Report (City of St. Petersburg) |
- The report gives an average only, with no range.
- The city disinfects with chloramines.
What does 158 mg/L mean for a St. Petersburg home?
158 mg/L is about 9.2 grains per gallon. St. Petersburg's published 158 mg/L is 22 mg/L under the 180 mg/L top of the USGS hard class. (USGS hardness classes)
Which systems fit St. Petersburg water?
Water softenerFor hardness; St. Petersburg reads as hard.Whole-home filterFor taste and odor from the disinfectant.Reverse osmosisDrinking water at one St. Petersburg kitchen tap.
How does a St. Petersburg quote work?
- Send a request from one of the 10 St. Petersburg ZIP codes listed below.
- An assessment at your home, where your tap can be checked against City of St. Petersburg Water Resources's published 158 mg/L.
- You get a written quote listing what is included.
- Installation and service by that company.
Common questions
- How hard is the water in St. Petersburg?
- Hardness reported by City of St. Petersburg Water Resources: 158 mg/L, average of monthly samples (Calendar year 2025).
- Is St. Petersburg water hard or soft?
- Hard. St. Petersburg's published 158 mg/L is 22 mg/L under the 180 mg/L top of the USGS hard class.
- How many grains per gallon is St. Petersburg water?
- The utility publishes hardness in mg/L, not grains. The published 158 mg/L is about 9.2 grains per gallon, converted by us at 17.1 mg/L per grain.
- How does St. Petersburg water compare with nearby cities?
- Published hardness in St. Petersburg spans 158 mg/L. Covered cities near St. Petersburg: Tampa 140 to 300 mg/L; Orlando 129 mg/L. Each figure comes from that city's own utility, not from St. Petersburg's.
- Do I need a water softener in St. Petersburg?
- City of St. Petersburg Water Resources publishes 158 mg/L for St. Petersburg, which reads as hard. A test at your house shows whether your tap matches it.
- Which water treatment system fits a St. Petersburg home?
- St. Petersburg's published 158 mg/L reads as hard, which is what a softener treats. The installing company tests the water at your St. Petersburg address before quoting.
- Is the water the same in every St. Petersburg home?
- City of St. Petersburg Water Resources publishes one figure for its whole system (Calendar year 2025).
- Does a water softener remove chlorine?
- No. A softener targets hardness, not the disinfectant City of St. Petersburg Water Resources adds.
- How much does a water softener cost in St. Petersburg?
- We publish no prices for St. Petersburg. The installing company gives a written quote after an assessment at your home.
- Who installs the system?
- We have not named a local installing company for St. Petersburg yet. We will tell you the company's name and ask you before your request is shared with anyone.
- Is My Home Water System part of the St. Petersburg city government or water utility?
- No. My Home Water System is not affiliated with City of St. Petersburg Water Resources; it copies and links the published figures.
- Is booking an assessment a purchase?
- No, and a request commits you to nothing.
ZIP codes this page covers
33701, 33702, 33703, 33704, 33705, 33710, 33711, 33712, 33713, 33716
Nearby
Tampa. See the whole Tampa Bay area.
Compare St. Petersburg with other cities on hard water by city.