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— 2025 PROVIDER REPORT

City of St. Petersburg Water Resources
water report

Start with the quick list. Amounts, limits and explanations are available farther down only if you want them.

SUBSTANCES REPORTED

Water hardness
Chloramines
Haloacetic acids (HAA5)
Total trihalomethanes (TTHM)
Nitrate as nitrogen
Sodium — Cosme treated water
Lead at sampled taps
E. coli distribution sample

See amounts and explanations ↓

YOUR PROVIDER WATER SNAPSHOT● Verified official source

8REPORTED

Official monitoring reported for January–December 2025; some inorganic and lead/copper results use the latest required earlier sampling

No primary maximum-contaminant-level violation reported for 2025

City of St. Petersburg Water Resources

“8 reported substances translated into plain English below.”

WATER SOURCETampa Bay Water blend of Floridan Aquifer groundwater, regional surface water and desalinated seawater

TREATMENTAeration, lime softening, filtration, chloramine disinfection and pH stabilization

WHO THIS REPORT COVERSCity of St. Petersburg Water Resources customers; verify the provider on the utility bill

Water Resources Dispatch Center727-893-7261

— QUICK WATER SUMMARY

What your water provider reported.

St. Petersburg receives a changing blend of groundwater, surface water and desalinated water from Tampa Bay Water, then treats it at the Cosme plant with aeration, lime softening, filtration and chloramine disinfection. These results apply to City of St. Petersburg Water Resources customers—not every address in Pinellas County or every St. Petersburg mailing address.

Start with the simple list below. Open See details to see whether the comparison is a legal limit, a health benchmark or another value used in the official report.

UTILITY REPORTDescribes the public system

Useful for source water, treatment and provider-wide monitoring.

PROPERTY TESTMeasures one address

Needed when the concern involves a building, service line, private well or exact tap.

IMPORTANTOne does not replace the other

A compliant utility report cannot rule out a plumbing issue inside one property.

01Water hardnessNaturally occurring calcium and magnesium create scale and soap-performance issues; hardness is mainly an aesthetic and maintenance concern.PROVIDER RESULT158 mg/L average in 2025, about 9.2 grains per gallonSee details

HEALTH BENCHMARKNo federal health-based limit

Legal limits are enforceable. Health benchmarks and goals may be non-enforceable comparison values.

REPORT STATUSHard water; not a drinking-water violation

TREATMENT CONTEXTA complete water profile helps a qualified professional select the right approach.

02ChloraminesThe disinfectant used to control microbes. Compliance is based on the running annual average, not the highest individual result.PROVIDER RESULT3.73 ppm highest running annual average; range 0.60–5.60See details

REPORT COMPARISON VALUE4 ppm MRDL

Legal limits are enforceable. Health benchmarks and goals may be non-enforceable comparison values.

REPORT STATUSNo maximum residual disinfectant level violation reported

TREATMENT CONTEXTWhole-home activated carbon is commonly evaluated.

03Haloacetic acids (HAA5)A group of byproducts created during drinking-water disinfection.PROVIDER RESULT21 ppb; range 6.78–26.9See details

LEGAL LIMIT60 ppb MCL

Legal limits are enforceable. Health benchmarks and goals may be non-enforceable comparison values.

REPORT STATUSBelow the federal MCL

TREATMENT CONTEXTWhole-home activated carbon is commonly evaluated.

04Total trihalomethanes (TTHM)A group of byproducts created during drinking-water disinfection.PROVIDER RESULT23 ppb; range 12.7–28.6See details

LEGAL LIMIT80 ppb MCL

Legal limits are enforceable. Health benchmarks and goals may be non-enforceable comparison values.

REPORT STATUSBelow the federal MCL

TREATMENT CONTEXTWhole-home activated carbon is commonly evaluated.

05Nitrate as nitrogenCan come from fertilizer runoff, septic systems, sewage and natural deposits.PROVIDER RESULT0.15 ppm in November 2025See details

LEGAL LIMIT10 ppm MCL

Legal limits are enforceable. Health benchmarks and goals may be non-enforceable comparison values.

REPORT STATUSBelow the federal MCL

TREATMENT CONTEXTPoint-of-use reverse osmosis is commonly evaluated.

06Sodium — Cosme treated waterCan reflect source-water minerals and saltwater influence. The date matters because this was not a 2025 sample.PROVIDER RESULT13.5 ppm in the latest required City sample from May 2023See details

REPORT COMPARISON VALUE160 ppm Florida standard

Legal limits are enforceable. Health benchmarks and goals may be non-enforceable comparison values.

REPORT STATUSBelow the Florida standard

TREATMENT CONTEXTPoint-of-use reverse osmosis is commonly evaluated.

Hardness and TDS can vary from street to street.

A provider report cannot tell us the exact levels at your tap. We need to test your home to give you an accurate measurement.

Get my exact measurements →

*Provider reports describe the public distribution system—not the water at a specific home. Actual results vary by service address, plumbing, seasonal utility conditions and system configuration. A softener does not necessarily reduce TDS. Address-specific testing is required before treatment is recommended.

— YOUR LOCAL WATER HUB

What would you like to check next?

Stay with information for Pinellas County. Choose one clear next step.

— WATER NEWS & ANSWERS

Important water news. Clear everyday answers.

Local developments, treatment changes and practical explanations built from official sources.

INTERACTIVE WATER-PROBLEM CHECKERDoes your water look, smell or taste different?

Choose what you are noticing and get common causes, a safe first check and guidance on when to call the utility.

Check my water symptom →

BREAKING • OKEECHOBEE COUNTYLead exceeds action level in Okeechobee water samplesWhat residents need to know and do now →NEW • BROWARD COUNTYWill Fort Lauderdale’s new $666 million plant end yellow water?What the treatment upgrade can fix—and what it cannot →YOUR WATER REPORTWhat does a “safe amount” of chemicals actually mean?Legal limits, health goals and what compliance really tells you →

— POPULAR LOCAL WATER REPORTS

Official results for cities readers are checking now

View all Water News & Answers →

01

Less scale

Protect fixtures, water heaters and appliances from hard-water buildup.

02

Better showers

Softer-feeling water, easier lather and less residue on skin and hair.

03

Cleaner taste

Reduce the chlorine taste and odor many families notice at the tap.

— GET ADDRESS-SPECIFIC HELP

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your home’s water?

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