{"database": "openregs", "table": "federal_register", "rows": [["2017-20447", "Ambient Air Monitoring Reference and Equivalent Methods: Designation of Three New Reference Methods", "Notice", "Notice is hereby given that the Environmental Protection Agency (EPA) has designated three new reference methods for measuring concentrations of PM<INF>2.5</INF>, PM<INF>10</INF>, and PM<INF>10-2.5</INF> in the ambient air.", "2017-09-25", 2017, 9, "https://www.federalregister.gov/documents/2017/09/25/2017-20447/ambient-air-monitoring-reference-and-equivalent-methods-designation-of-three-new-reference-methods", "https://www.govinfo.gov/content/pkg/FR-2017-09-25/pdf/2017-20447.pdf", "Environmental Protection Agency", "145", "Notice is hereby given that the Environmental Protection Agency (EPA) has designated three new reference methods for measuring concentrations of PM<INF>2.5</INF>, PM<INF>10</INF>, and PM<INF>10-2.5</INF> in the ambient air.", null]], "columns": ["document_number", "title", "type", "abstract", "publication_date", "pub_year", "pub_month", "html_url", "pdf_url", "agency_names", "agency_ids", "excerpts", "regulation_id_numbers"], "primary_keys": ["document_number"], "primary_key_values": ["2017-20447"], "units": {}, "query_ms": 0.4510189755819738, "source": "Federal Register API & Regulations.gov API", "source_url": "https://www.federalregister.gov/developers/api/v1", "license": "Public Domain (U.S. Government data)", "license_url": "https://www.regulations.gov/faq"}