{"database": "openregs", "table": "federal_register", "rows": [["2021-26619", "Air Plan Approval; Arizona; Bullhead City; Second 10-Year PM10 Limited Maintenance Plan", "Proposed Rule", "The Environmental Protection Agency (EPA) is proposing to approve a revision to the Bullhead City portion of the Arizona State Implementation Plan (SIP). These revisions concern the second 10-year maintenance plan for Bullhead City for the 1987 National Ambient Air Quality Standards (NAAQS or \"standards\") for particulate matter less than 10 micrometers in diameter (PM<INF>10</INF>).", "2021-12-09", 2021, 12, "https://www.federalregister.gov/documents/2021/12/09/2021-26619/air-plan-approval-arizona-bullhead-city-second-10-year-pm10-limited-maintenance-plan", "https://www.govinfo.gov/content/pkg/FR-2021-12-09/pdf/2021-26619.pdf", "Environmental Protection Agency", "145", "The Environmental Protection Agency (EPA) is proposing to approve a revision to the Bullhead City portion of the Arizona State Implementation Plan (SIP). These revisions concern the second 10-year maintenance plan for Bullhead City for the 1987...", 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": ["2021-26619"], "units": {}, "query_ms": 0.5297079915180802, "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"}