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Drinking Water

IMPORTANT INFORMATION ABOUT YOUR DRINKING WATER
Naval Air Station Jacksonville
Chemical Monitoring Public Notice

What happened?

We are required to monitor your drinking water for specific contaminants on a regular basis. Results of regular monitoring are an indicator of whether or not your drinking water meets health standards.

During the July through September 2024 monitoring period, we were required to test for Stage 2 Disinfection Byproducts (S2 DBPs), including Total Trihalomethanes (TTHMs) and Haloacetic Acids (HAA5s), in the second month, first week; however, we tested late for these contaminants during the second month, fourth week. The late sample was due to a scheduling conflict with the lab receiving the results. Sample results from the late sample indicated that all parameters were within the acceptable drinking water requirements set forth by the Safe Drinking Water Act (SDWA).

What does this mean and what has been done?

Per drinking water regulations, we are required to notify you of this late sampling. There is not an immediate risk, as all sample results were within the requirements set forth in the SDWA. If there had been an issue with the sampling results, you would have been notified immediately. Furthermore, all past TTHM and HAA5 sampling results have been below the MCL and within SDWA standards and samples taken since the September 2024 monitoring period have also been within SDWA standards. We are simply notifying you that the sample during this period was late.

To ensure this late sampling does not happen again, safeguards have been put in place to ensure that the required sampling is performed on time. At least one week prior to each future sampling, the Public Works Department Utilities Commodity Manager will contact the Drinking Water Plant Operators to ensure that the lab has been scheduled appropriately to conduct the required sampling within the required timeframe.

Further information on TTHM and HAA5 parameters:

Some people who drink water containing TTHMs in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous system, and may have an increased risk of getting cancer.

Some people who drink water containing HAA5s in excess of the MCL over many years may have an in- creased risk of getting cancer.

Any customers who are concerned about their exposure to these contaminants can choose alternative sources of water for ingestion.

For more information, please contact the Public Works Department Utilities Commodity Manager at 904-542-6440, or you may contact the Department of Environmental Protection, Potable Water Section at 904-256-1700.

This notice is being sent to you by our water system: NAS Jacksonville
Potable Water System ID: 2161212
Date distributed: January 31, 2025

The health and well-being of Sailors, their families, and civilians are the Navy's top priority.

NAS Jacksonville's drinking water systems comply with all applicable Federal, State, and local safe drinking water regulations, Executive Orders, and Navy Policy by performing water quality monitoring and providing customers an annual Consumer Confidence Report as well as investigating and resolving customer complaints.

These programs are designed to ensure that safe drinking water is delivered to every consumer. Here are your latest Consumer Confidence Reports.

“Naval Facilities Engineering Systems Command – PFAS Sampling Results”

https://www.navfac.navy.mil/Divisions/Environmental/Products-and-Services/Environmental-Restoration/SOUTHEAST/

NAS Jacksonville 2023 Consumer Confidence Report
NAS Jacksonville 2022 Consumer Confidence Report
NAS Jacksonville 2021 Consumer Confidence Report
NAS Jacksonville 2020 Consumer Confidence Report
NAS Jacksonville 2019 Consumer Confidence Report
NAS Jacksonville 2018 Consumer Confidence Report
NAS Jacksonville 2017 Consumer Confidence Report

What are per- and polyfluoroalkyl substances and where do they come from?
Per- and polyfluoroalkyl substances (PFAS) are a group of thousands of man-made chemicals. PFAS have been used in a variety of industries and consumer products around the globe, including in the U.S., since the 1940s. PFAS have been used to make coatings and products that are used as oil and water repellents for carpets, clothing, paper packaging for food, and cookware. They are also contained in some foams (aqueous film-forming foam or AFFF) currently used for fighting petroleum fires at airfields and in industrial fire suppression processes. PFAS chemicals are persistent in the environment, and some are persistent in the human body – meaning they do not break down and they can accumulate over time.

Is there a federal or regulation for PFAS in drinking water?
On April 10, 2024, the US EPA established MCLs for a subset of PFAS chemicals.

Chemical	Maximum Contaminant Level (MCL)
PFOA	4.0 ppt
PFOS	4.0 ppt
PFNA	10 ppt
PFHxS	10 ppt
HFPO-DA (GenX chemicals)	10 ppt
Mixture of two or more: PFNA, PFHxS, HFPO-DA, and PFBS	Hazard Index of 1

EPA requires implementation of sampling in accordance with the new MCLs within three years of the publication date and implementation of any required treatment within five years.
These limits did not apply for the 2023 calendar year because they had not been published. However, the DoD proactively promulgated policies to monitor drinking water for PFAS at all service owned and operated water systems at a minimum of every two years. The DoD policy states that if water sampling results confirm that drinking water contains PFOA and PFOS at individual or combined concentrations greater than the 2016 EPA health advisory (HA) level of 70 ppt, water systems must take immediate action to reduce exposure to PFOS or PFAS. For levels less than 70 ppt but above the 4 ppt level (draft at the time of policy publication), DoD committed to planning for implementation of the levels once EPA’s published MCLs take effect.

Has ROTHR site, Vieques, PR tested its water for PFAS?
Most recently, samples were collected from ROTHR site, Vieques, PR in April 2024. We are informing you that 7 of the 29 PFAS compounds covered by the sampling methods were detected above the method reporting limit (MRL). The results are provided in the attached results report. EPA does not have a HA or MCL for all of these compounds at this time. PFOS was detected above the new MCL. For regulated PFAS above the new MCL and in accordance with DoD policy, Navy is coordinating with DoD to plan and program operational controls or additional treatment to ensure the drinking water meets the MCLs as soon as practicable at all of our impacted installations. There is no immediate cause for concern, but we will continue to monitor the drinking water closely.

PFOA, PFHxS, PFNA, PFBS, and Gen X were not detected above the new MCLs. As the regulated chemicals were below the new MCLs, there is no immediate cause for concern, but we will continue to monitor the drinking water closely.

ROTHR Vieques - 2024 PFAS Sampling Results:
/Portals/83/cnrse/Documents/FY24 Vieques Event 1 PFAS_533 and 537_1_ Sample Results Memo.pdf?ver=UmsvnW3G_ytiWeThCZVyWw%3d%3d

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