ZipCheckup API
Free REST API for US ZIP-level environmental safety data: water quality, air quality, PFAS, radon, lead, flood risk.
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- Data Science, Frontend GIS
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- 2026-10-10
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Data Science › Fun > Datasets: “Free ZIP-level environmental safety data for 42,000+ US ZIP codes: water quality, air quality, PFAS contamination, radon, lead, flood risk, and 11 more verticals. Public REST API, npm/PyPI packages, CC BY 4.0.”
Frontend GIS › 💾 Data sources > Web APIs: “Free REST API for US ZIP-level environmental safety data: water quality, air quality, PFAS, radon, lead, flood risk.”