{"permit":"PA0246620","name":"NORFOLK SOUTHERN RAILWAY CO","state":"PA","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/PA0246620"},"about":[{"label":"What it is","text":"Railroads, Line-Haul Operating (EPA's industry listing)"},{"label":"Where","text":"Harrisburg, Pennsylvania","href":"https://www.openstreetmap.org/?mlat=40.258056&mlon=-76.7975#map=14/40.258056/-76.7975"},{"label":"Last 12 months","text":"Over a limit 4 times, last in March 2026 (Solids, total suspended)"},{"label":"Permit","text":"In force until Jan 31, 2031"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"PA","sic":"40","permits":7,"list":"https://passage-data.com/api/v1/permits?state=PA&sic=40","page":"https://passage-data.com/dmr/s/PA/40"},"limits_from_version":null,"record":{"last_filed":"2026-06-30","over":4,"over_by":[["Solids, total suspended",4]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Solids, total suspended","times":4,"find_limits":{"parameter":"total suspended solids","place":"US-PA","medium":"water_discharge"},"get":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-PA&medium=water_discharge"}],"limits":[{"outfall":"001","parameter":"Oxygen demand, chem. 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