Is there PFAS in Mdwasa/rex Utilities water?

Yes. EPA's final UCMR 5 results show Mdwasa/rex Utilities averaged 34.7 ppt of PFOS at its worst sampling point, 8.7 times the EPA limit of 4 ppt.

Mdwasa/rex Utilities is a public water system drawing on groundwater, based in Miami, Florida, serving about 45,200 people, including Hialeah, Homestead, Opa Locka, Miami Gardens. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 10 times across 5 sampling points between Feb 2025 and Aug 2025.

Every PFAS detected

Not detected: PFTA, PFMBA, 11Cl-PF3OUdS, 9Cl-PF3ONS, ADONA, HFPO-DA, 6:2 FTS, PFEESA, NMeFOSAA, PFPeS, NEtFOSAA, PFHpS, PFMPA, NFDHA, 8:2 FTS, PFTrDA, PFNA, PFDA, PFDoA, PFUnA, 4:2 FTS.

Lithium, tested in the same program: not detected.

What the EPA limits mean here

In April 2024 EPA set enforceable limits of 4 ppt for PFOA and PFOS, 10 ppt each for PFHxS, PFNA and GenX, and a hazard index of 1 for mixtures. Utilities were given until 2029 to comply. In May 2026 EPA proposed keeping only the PFOA and PFOS limits and moving that deadline to 2031. Until that proposal is final, the 2024 limits stand.

Compliance is judged on a running annual average at each entry point, so we show the average at this system's worst sampling point next to its single highest result. UCMR 5 results do not by themselves put a utility in or out of compliance.

What you can do at home

Two routes work for PFAS. For drinking and cooking water only, a reverse osmosis system certified to NSF/ANSI 58 with a PFOA/PFOS reduction claim is the cheapest proven option. To treat every tap and shower, a whole-house carbon system with enough contact time works, but check that the maker has PFAS test data, not just a marketing claim. See the best filters for PFAS and how PFAS removal works.

Other systems in Florida

• North Sumter Utility 3wps 3 PFAS detected
• Dunedin Water System none detected
• Sebring Water ; Sewer System above an EPA limit
• University of Central Florida none detected
• City of Riviera Beach Utility District above an EPA limit
• City of Leesburg above an EPA limit

All 409 tested systems in Florida

ZIP codes served

33010 33014 33015 33016 33018 33030 33031 33032 33033 33034 33035 33039 33054 33055 33056

As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.

Cite this page

Well & Tap. "PFAS in Mdwasa/rex Utilities water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID FL4131202. https://wellandtap.com/pfas/florida/mdwasa-rex-utilities/

About this data

Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID FL4131202). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.