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— 2025 PROVIDER REPORT

City of Marco Island Utilities
water report

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

SUBSTANCES REPORTED

Total trihalomethanes (TTHM)
Haloacetic acids (HAA5)
Sodium
Arsenic
Combined radium 226/228
Lead at sampled taps
PFAS — January 2026 replacement UCMR sample

See amounts and explanations ↓

YOUR PROVIDER WATER SNAPSHOT● Verified official source

7REPORTED

Official monitoring reported for January–December 2025; lead and copper values use the latest required 2023 sampling

No maximum-contaminant-level, disinfectant-level or lead/copper action-level violation reported

City of Marco Island Utilities

“7 reported substances translated into plain English below.”

PUBLIC WATER SYSTEM IDFL5110183

WATER SOURCEMainland surface water and brackish Floridan Aquifer groundwater

TREATMENTEnhanced lime softening, membrane filtration, reverse osmosis, chloramine disinfection and hardness blending

WHO THIS REPORT COVERSMarco Island and Marco Shores utility customers

City of Marco Island Water and Sewer239-394-3880

— QUICK WATER SUMMARY

What your water provider reported.

Marco Island Utilities serves Marco Island and Marco Shores using mainland surface water and brackish Floridan Aquifer groundwater. Treatment includes enhanced lime softening, membrane filtration, reverse osmosis, chloramine disinfection and hardness blending for corrosion inhibition. The 2025 report lists no violations in its detected-contaminant tables.

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.

Why can a legal water limit change? See what “safe” and “compliant” actually mean →

01Total trihalomethanes (TTHM)A group of byproducts created during drinking-water disinfection. The highest individual result is not the compliance value by itself.PROVIDER RESULT63.2 ppb; range 26.7–76.1See 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.

02Haloacetic acids (HAA5)A group of byproducts created during drinking-water disinfection.PROVIDER RESULT23.0 ppb; range 15.6–28.4See 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.

03SodiumCan reflect natural groundwater conditions and saltwater influence.PROVIDER RESULT56.0 ppmSee 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.

04ArsenicCan occur naturally in groundwater or come from industrial and agricultural activity.PROVIDER RESULT0.80 ppb; range 0.27–0.80See details

LEGAL LIMIT10 ppb MCL

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

REPORT STATUSBelow the federal MCL

TREATMENT CONTEXTCertified point-of-use RO or contaminant-specific filtration is commonly evaluated.

05Combined radium 226/228Radioactive minerals that can occur naturally in groundwater.PROVIDER RESULT1.70 pCi/L; range not detected–1.70See details

LEGAL LIMIT5 pCi/L MCL

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

REPORT STATUSBelow the federal MCL

TREATMENT CONTEXTCertified point-of-use RO or contaminant-specific filtration is commonly evaluated.

06Lead at sampled tapsLead generally enters water through service lines, fixtures or building plumbing.PROVIDER RESULT2.9 ppb at the 90th percentile; no sampled sites above 15 ppb in 2023See details

REPORT COMPARISON VALUE15 ppb action level

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

REPORT STATUSSystem action level not exceeded

TREATMENT CONTEXTCertified point-of-use RO or contaminant-specific filtration 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.

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*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.

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— FLORIDA TAP WATER NEWS & ANSWERS

Important Florida tap water news. Clear everyday answers.

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

NEW CONSUMER GUIDE • HOME WATER TESTSWhat should you expect from a free home water test?What hardness, TDS and pH can show—and which questions require a laboratory →NEW ANALYSIS • DRINKING-WATER STANDARDSWhy do tap-water standards keep changing?What “safe” meant before, what changed and what compliance really tells you →DRINKING-WATER WARNING • OKEECHOBEE COUNTYLead exceeds action level in Okeechobee water samplesWhat residents need to know and do now →

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.

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— POPULAR COMMUNITY WATER GUIDES

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