{"permit":"TX0062642","name":"NATIONAL OILWELL VARCO, LP","state":"TX","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/TX0062642"},"about":[{"label":"What it is","text":"Oil And Gas Field Machinery (EPA's industry listing)"},{"label":"Where","text":"Houston, Texas","href":"https://www.openstreetmap.org/?mlat=29.86777&mlon=-95.60467#map=14/29.86777/-95.60467"},{"label":"Last 12 months","text":"Over a limit once, last in April 2026 (Copper, total [as Cu]). 1 of 18 reports filed late"},{"label":"Permit","text":"In force until May 26, 2027"}],"renewal_due":{"date":"2026-11-27","when":"Nov 27, 2026 (in 23 days)","urgent":true},"renewal_check":{"offered_because":"application_due_within_18_months","application_due":"2026-11-27","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/TX0062642#renewal","says":"Each limit a renewal could tighten or add, from the state's water-quality standards and the federal rules for this kind of discharge, each cited to its rule, beside EPA's 12-month record; a rule we do not hold is named, never guessed. A person orders it on the permit's page with their email; it is sent by email within 5 business days."},"sector":{"state":"TX","sic":"35","permits":7,"list":"https://passage-data.com/api/v1/permits?state=TX&sic=35","page":"https://passage-data.com/dmr/s/TX/35"},"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":1,"over_by":[["Copper, total [as Cu]",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Copper, total [as Cu]","times":1,"find_limits":{"parameter":"copper","place":"US-TX","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-TX&medium=surface_water"}],"limits":[{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"monthly minimum","qualifier":">=","value":"4","unit":"mg/L","report_only":false,"enforceable":true,"months":["JAN","FEB","MAR","NOV","DEC"],"limit_set":"PROCESS WASTEWATER - 001"},{"outfall":"001","parameter":"Oxygen, dissolved [DO]","parameter_code":"00300","statistic":"monthly minimum","qualifier":">=","value":"6","unit":"mg/L","report_only":false,"enforceable":true,"months":["APR","MAY","JUN","JUL","AUG","SEP","OCT"],"limit_set":"PROCESS WASTEWATER - 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