In 2024, EPA set the first-ever enforceable limits for PFAS in drinking water, establishing a 4 parts per trillion (ppt) limit for PFOA and PFOS individually. In 2025, EPA revised the rule, keeping those two limits intact but rescinding the limits for PFNA, PFHxS, HFPO-DA (GenX), and the mixture rule. Compliance for utilities is required by 2031.
What Tampa Bay Water Has Reported
Tampa Bay Water has published PFAS monitoring results showing PFOA and PFOS detections below the 4 ppt MCL in most samples. However, the data also shows detectable levels of other PFAS compounds that no longer have enforceable limits under the revised rule. The monitoring picture for individual utilities served by Tampa Bay Water varies.
What the 2031 Deadline Means
Utilities have until 2031 to comply with the PFOA and PFOS limits. Until then, there is no legal obligation to treat or notify if levels exceed 4 ppt, though utilities are required to continue monitoring. Homeowners who want protection now cannot rely on utility compliance timelines.
What Filters Actually Work for PFAS
Reverse osmosis is the most effective technology for PFAS removal and can reduce PFAS concentrations by over 90 percent. Activated carbon filtration provides partial reduction. NSF/ANSI Standard 58 certifies RO systems for PFAS reduction, look for this certification when evaluating products.
The Practical Takeaway
If you are concerned about PFAS exposure, a point-of-use reverse osmosis system at your kitchen tap provides proven, immediate protection regardless of where your utility stands on compliance. Pure Viva installs NSF-certified RO systems and can test your water for a broad PFAS panel to establish a baseline before and after treatment.