One or more PFAS compounds exceed EPA Maximum Contaminant Levels. This is not a current violation — the federal compliance deadline is April 2029 (a proposed extension to 2031 is not final). These are UCMR 5 results from 2023 to 2025; the system may have installed treatment since.
Key contaminants vs MCL
PFOA7.6 ppt(MCL: 4 ppt)
EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: April 26, 2029 under the current rule.
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As printed in the state's own documents. Amounts are not added together: each is a different kind of figure.
Oct 2025 · State Street - GAC treatment for PFOA/PFOS removal and raising wellhead, Upgrade Water Treatment Plant, Upgrade Ground Water Source · $14.4M
On the FFY2026 Multi-Year List (listing form submitted) (amount is the project cost). Source →
Jan 23, 2025 · This project consists of installation of two pairs of Granular Activated Carbon (GAC) adsorption vessels and all associated piping, valves, and appurtenances to treat perfluoroalkyl substances (PFAS) contamination, specifically perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), at Well Nos. 15 and 18. Other work includes electrical service improvements and construction of a GAC room within the treatment facility. The project scope is further defined by the engineering report entitled, "PFAS Treatment at Wells 15 and 18" dated August 2022 (Revised December 2023), by D&B Engineers and Architects as may be updated, amended, supplemented, and approved by the New York State Department of Health. I.D. No. 3 01/23/2025 · $5M
Approved by EFC Board of Directors (Resolution 3064, 2025-01-23). Source →
Oct 2024 · Installation of new GAC system at the Wells 15 and 18 facility for PFAS removal, New Water Treatment Plant · $11.1M
On the FFY2025 Multi-Year List (listing form submitted) (amount is the project cost). Source →
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Oct 2024
State Street - GAC treatment for PFOA/PFOS removal and raising wellhead, Upgrade Water Treatment Plant, Upgrade Ground Water Source
$14.4M
On the FFY2025 Multi-Year List (listing form submitted) (amount is the project cost). Source →
Aug 22, 2024 · 19099 Westbury Water Nassau $8,976,000 District Proiect Description This project is for the design and construction of a new treatment process at the existing water treatment facility to remove nitrate, volatile organic compounds (VOCs), 1 ,4- dioxane, and perfluorooctanoic acid (PFOA) from Well Nos. 10 and 14. The project includes the construction of a new ion exchange treatment system to remove nitrate, installation of a packed tower aeration system to remove voes after the anion exchange system, and an Advanced Oxidation Process (AOP) treatment system to remove 1,4-dioxane from the raw water. A proposed Granular Activated Carbon (GAC) treatment system will be used to quench residual hydrogen peroxide, and to remove potential AOP byproducts, additional voes, and PFOA. The facility will be designed to treat blended raw water from Well Nos. 10 and 14 at a combined rate of 2,750 gallons per minute (gpm). The project is defined by the engineering report entitled "1,4- Dioxane and PFOA Removal at Wells 10 and 14" dated November 2023 by D&B Engineers and Architects, as may be updated, amended, supplemented, and approved by the New York State Department of Health (NYSDOH). · $8.98M
Approved by EFC Board of Directors (Resolution 3045, 2024-08-22). Source →