Hattiesburg, MS Water Quality (ZIP 39401)

Quick Answers

Is ZIP 39401 tap water safe to drink? PFAS compounds have been detected in 39401's water at an average of 0.01 ppt across 1 compound. A certified pitcher filter or reverse osmosis system is recommended, especially for sensitive populations.

What filter should I use in 39401? Match the filter to the data: reverse osmosis handles PFAS, lead, and arsenic together; NSF-53 pitchers cover the taps you drink from. A basic Brita pitcher will not remove PFAS.

ZIP 39401 Water Quality Summary

EPA testing has detected PFAS "forever chemicals" in the water system serving ZIP 39401 (Hattiesburg, MS). Monitoring found a peak of 0.01 ppt across 1 system, averaging 0.01 ppt over 1 detected compound.

Contamination Level: LOW – Low contamination – PFAS detected but at lower levels; monitoring continues.

Top Detected Compounds in ZIP 39401

• PFOA: 0.01 ppt

Lead in ZIP 39401 Water

EPA Lead and Copper Rule testing recorded 29 lead samples for the system serving 39401, with a 90th-percentile high of 0.0169 mg/L (above the EPA 0.015 mg/L action level). There is no safe level of lead for children; homes built before 1986 should use a certified NSF/ANSI 53 lead filter.

About the Data

These figures come from EPA UCMR5 (2023-2025) plus Lead and Copper Rule and SDWIS records for the public water system serving ZIP 39401. UCMR5 is the most comprehensive national drinking water survey in US history.

Beyond water: other exposures in Hattiesburg, MS

Drinking water is one exposure route. These are the other federal datasets that cover ZIP 39401 and Forrest County, MS.

Radon risk in Forrest County, MS

The EPA places Forrest County, MS in Zone 3 - the EPA's lowest-risk category, with a predicted average indoor radon level below 2 pCi/L. Zone maps predict the radon potential of an area from geology and existing indoor readings - they do not describe any individual home. Radon is the leading cause of lung cancer among people who have never smoked, and the only way to know your own level is a test kit.

Lead paint risk in Forrest County, MS

Census figures show 48% of homes in Forrest County, MS were built before 1980, and 12% before 1950. Lead-based paint was banned for residential use in 1978, so older housing stock is the strongest available proxy for lead-paint exposure. This is a statistic about the county's housing, not a test of any particular property - if your home predates 1980, a lead swab test is the way to check.

Air quality in Forrest County, MS

Modelled annual fine-particle pollution (PM2.5) for Forrest County, MS averages 9.3 µg/m³, above the EPA's annual PM2.5 standard of 9 µg/m³. PM2.5 is the pollution fraction small enough to reach deep into the lungs. These are CDC modelled estimates for the county as a whole, not a reading taken at this ZIP code.

Industrial releases near 39401

EPA Toxics Release Inventory data for 2023 records 3 reporting facilities within about five miles of 39401, together reporting roughly 96,549 pounds of on-site chemical releases that year. TRI covers facilities above federal reporting thresholds, so smaller sources are not included, and a reported release is not the same as a measured concentration in air or water.