Not on the chart: Lake Charles’s PFOS result was below the lab’s reporting limit, so it can’t be placed among the cities that detected it.
In Louisiana, 5 of 72 city reports have a regulated PFAS above the federal limit. PFAS across Louisiana →
Your tap usually reflects the system’s water, but results vary between samples and sources. Only a certified lab test tells you what reaches your glass today.
How to test for PFASPFAS are measured in parts per trillion. Home strips can’t read that low, so a certified lab is the only way to get a number for your tap.
These are the methods behind the federal results. Ask which compounds are on the panel, so the five PFAS with federal limits are included, and keep the reporting limit with your result.
Find a certified lab in Louisiana ↗ (opens in a new tab)No home strip has been shown to detect PFAS at the levels federal limits use. A mail-in lab kit is the closest at-home option; check that its lab is accredited and that its panel names the compounds you need.
Read your lab results →Why: these are the technologies certified to reduce PFAS. Certification is compound by compound, so check that a listing names the compound you need to reduce.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
Nothing in Lake Charles’ record is a PFAS concern, so no product is matched here.
None of the 29 PFAS tested was detected above the lab’s reporting limit, which is not the same as zero. PFAS not on that list have no result here, and your tap was not sampled.
0 of 5 regulated PFAS were detected. In EPA UCMR 5 testing of CITY OF LAKE CHARLES WATER SYSTEM (2024-10-03 to 2025-04-03): none of the 29 PFAS tested detected. "Not detected" means below the lab's reporting limit, not proven zero.
EPA's 2024 drinking-water rule set maximum contaminant levels of 4.0 ng/L for PFOA and for PFOS, and 10 ng/L for PFHxS, PFNA and HFPO-DA (GenX). In May 2026 EPA proposed keeping the PFOA and PFOS limits, with the option of until 2031 to comply, and rescinding the other three. Until a final rule, all five limits apply. The 2024 rule also set a Hazard Index of 1 for mixtures of two or more of PFHxS, PFNA, GenX and PFBS; EPA has proposed rescinding it, and it applies until a final rule.
No. "Not detected" (ND) means the result was below the lab's reporting limit, not that the compound is absent. In Lake Charles's record, none of the 29 PFAS tested was detected. Their reporting limits run from 2 to 20 ng/L.
29 PFAS compounds in EPA UCMR 5 testing of CITY OF LAKE CHARLES WATER SYSTEM (2024-10-03 to 2025-04-03), including the five with federal limits. None was detected. PFAS not on that list have no result here.
Yes. These results describe the water system as a whole, and levels vary between samples and sources over time. PFAS come with the water rather than from home plumbing, so your tap usually reflects the system's water, but only a certified lab test of your own tap gives a number for your glass.
Use a state-certified lab that runs EPA Method 533 or 537.1, the methods behind the federal results. Ask which compounds are on the panel, and keep the reporting limit with your result. No home test strip has been shown to detect PFAS at the levels federal limits use.
Reverse osmosis (NSF/ANSI 58), activated carbon (NSF/ANSI 53) and anion exchange can reduce PFAS, but certification is compound by compound. Choose a model whose current listing names the compound you need to reduce, check it in the certifier's listing (NSF, WQA or IAPMO), and replace cartridges on schedule.
Compliance with the 2024 limits is judged on a running annual average, with a compliance date of 2029 (EPA has proposed allowing until 2031 for PFOA and PFOS). EPA has proposed rescinding the PFHxS, PFNA, GenX and Hazard Index limits; they apply until a final rule.