PFAS (total) — EPA 2024 drinking water HAL group in your home: a safety profile
Moderate risk for your home(Your Household-specific data is limited; this page draws from human adult context.) EPA's April 2024 National Primary Drinking Water Regulation for PFAS established legally enforceable Maximum Contaminant Levels (MCLs) for six PFAS: PFOA (4 ng/L = 4 ppt), PFOS (4 ng/L), PFNA (10 ng/L), PFHxS (10 ng/L), and HFPO-DA/GenX (10 ng/L) as individual MCLs, plus a Hazard Index (HI) ≤ 1 for the mixture of PFNA + PFHxS + HFPO-DA + PFBS. This is the most comprehensive PFAS drinking water regulation in US history. The MCLs were set at or near the limits of reliable analytical detection (4 ppt for PFOA/PFOS), reflecting EPA's assessment that no safe threshold for these carcinogens can be established below feasibility limits. EPA projects the rule will prevent ~10,000 serious illnesses and ~100–200 PFAS-attributable deaths annually. For adults, the primary health concerns driving the MCLs are: carcinogenicity (kidney cancer, testicular cancer — PFOA/PFOS Group 1), cardiovascular disease (cholesterol elevation, hypertension), immune suppression, and thyroid dysfunction. Public water systems serving ≥25 people have until 2027 to comply; systems must monitor, notify the public, and remediate if above MCLs.
What is pfas (total) — epa 2024 drinking water hal group?
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Risk for your household
Moderate riskEPA's April 2024 National Primary Drinking Water Regulation for PFAS established legally enforceable Maximum Contaminant Levels (MCLs) for six PFAS: PFOA (4 ng/L = 4 ppt), PFOS (4 ng/L), PFNA (10 ng/L), PFHxS (10 ng/L), and HFPO-DA/GenX (10 ng/L) as individual MCLs, plus a Hazard Index (HI) ≤ 1 for the mixture of PFNA + PFHxS + HFPO-DA + PFBS. This is the most comprehensive PFAS drinking water regulation in US history. The MCLs were set at or near the limits of reliable analytical detection (4 ppt for PFOA/PFOS), reflecting EPA's assessment that no safe threshold for these carcinogens can be established below feasibility limits. EPA projects the rule will prevent ~10,000 serious illnesses and ~100–200 PFAS-attributable deaths annually. For adults, the primary health concerns driving the MCLs are: carcinogenicity (kidney cancer, testicular cancer — PFOA/PFOS Group 1), cardiovascular disease (cholesterol elevation, hypertension), immune suppression, and thyroid dysfunction. Public water systems serving ≥25 people have until 2027 to comply; systems must monitor, notify the public, and remediate if above MCLs.
Regulatory consensus
4 regulatory and scientific bodies have classified PFAS (total) — EPA 2024 drinking water HAL group. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| US EPA | 2024 | Group 1 carcinogen | PFOA/PFOS; basis for MCL setting at limits of reliable analytical detection |
| US EPA | 2024 | Maximum Contaminant Level (MCL): 4 ng/L (4 ppt) | PFOA and PFOS individual MCLs |
| US EPA | 2024 | Maximum Contaminant Level (MCL): 10 ng/L | PFNA, PFHxS, and HFPO-DA/GenX individual MCLs |
| US EPA | 2024 | Hazard Index (HI) ≤ 1 | Mixture MCL for PFNA + PFHxS + HFPO-DA + PFBS |
Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.
Where your home encounter pfas (total) — epa 2024 drinking water hal group
- Consumer Products — Plastic bottles and containers, Food packaging, Plastic toys and household items
- Drinking Water — Leaching from plastic pipes, Migration from bottled water containers
- Indoor Environments — Off-gassing from plastic furniture, Degradation of plastic products
Safer alternatives
Lower-risk approaches that achieve a similar outcome to PFAS (total) — EPA 2024 drinking water HAL group:
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NSF-certified activated carbon filtration
Trade-offs: Does not remove all contaminants. Requires filter replacement.Relative cost: 2-5× conventional
Frequently asked questions
What products contain pfas (total) — epa 2024 drinking water hal group?
PFAS (total) — EPA 2024 drinking water HAL group appears in: Plastic bottles and containers (Consumer products); Food packaging (Consumer products); Leaching from plastic pipes (Drinking water); Migration from bottled water containers (Drinking water); Off-gassing from plastic furniture (Indoor environments).
Why do regulators disagree about pfas (total) — epa 2024 drinking water hal group?
PFAS (total) — EPA 2024 drinking water HAL group has been classified by 4 agencies including US EPA, US EPA, US EPA, US EPA, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.
See PFAS (total) — EPA 2024 drinking water HAL group in the home app
Look up products containing pfas (total) — epa 2024 drinking water hal group, compare to alternatives, and explore the full data record.
Open in home View raw API dataSources (2)
- US EPA: National Primary Drinking Water Regulations for PFAS — Final Rule (April 2024): Individual MCLs for PFOA/PFOS (4 ppt), PFNA/PFHxS/HFPO-DA (10 ppt), and Hazard Index for PFAS Mixtures (2024) — regulatory
- IARC Monographs Volume 135: Perfluorooctanoic Acid and Its Salts and Other Per- and Polyfluoroalkyl Substances — PFAS Carcinogenicity Framework, Group 1 Evidence, and Regulatory Context (2023) (2023) — regulatory
Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →