{"query":{"parameter":"aroclor 1242","place":"US-MS","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MS","US"],"parameter_keys":["cas:53469-21-9","cas:1336-36-3","name:polychlorinated biphenyls, total"],"names_matched":[["aroclor 1242","cas:53469-21-9"],["polychlorinated biphenyls total of all identified pcbs and congeners","cas:1336-36-3","total pcbs"],["polychlorinated biphenyls total pcbs","cas:1336-36-3","total pcbs"],["polychlorinated biphenyls total pcbs","name:polychlorinated biphenyls, total","total pcbs"],["total pcbs","cas:1336-36-3","total pcbs"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":11,"names":["Polychlorinated Biphenyls (PCBs)","~Polychlorinated Biphenyls (low risk)","~Polychlorinated Biphenyls (high risk)","Polychlorinated biphenyls"],"says":"11 rows share a parameter key with a longer name holding \"aroclor 1242\" but are printed under names without these words (that key is wider than the name): not sent. Ask for one by its name or CAS number."}},"total":11,"offset":0,"returned":11,"next_offset":null,"rows":[{"id":"d66abf8bce7cee1d","parameter":"Polychlorinated Biphenyls (Total PCBs)","value":"0.02 k","value_num":0.02,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1336-36-3","place":["US-MS"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_ms_wqs","title":"Mississippi 11 Miss. Admin. 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Code Pt. 6, Ch. 2 Surface Water Quality Criteria for Intrastate, Interstate and Coastal Waters: Table 2 numeric criteria (freshwater and saltwater acute/chronic, human health), dissolved oxygen, pH, class mineral criteria and waterbody-specific criteria","issuer":"State of Mississippi, Commission on Environmental Quality (Department of Environmental Quality)","edition":"effective December 17, 2021, as US EPA posts it in effect for CWA purposes (cover March 18, 2022; EPA requested more information only on definition 27 and the Ephemeral Stream reference)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/ms-wqs.pdf","source_sha256":"272701c5d5a2f8b10cf9c40fc50f5eb52f07753965d4aad7d23d360d4da34264","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"11 Miss. Admin. Code Pt. 6, Ch. 2, Rule 2.2.G Table 2","page":19,"quote":null}},{"id":"316b24a7587346b7","parameter":"Polychlorinated Biphenyls (Total PCBs)","value":"0.000064 k","value_num":0.000064,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1336-36-3","place":["US-MS"],"conditions":["receiving_water is freshwater","all waters except those classified Public Water Supply or within 50 stream miles upstream of a drinking water intake, which take the water & organisms criteria (Rule 2.2.F.4(a))"],"cite":{"instrument":"us_ms_wqs","title":"Mississippi 11 Miss. Admin. 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Code Pt. 6, Ch. 2 Surface Water Quality Criteria for Intrastate, Interstate and Coastal Waters: Table 2 numeric criteria (freshwater and saltwater acute/chronic, human health), dissolved oxygen, pH, class mineral criteria and waterbody-specific criteria","issuer":"State of Mississippi, Commission on Environmental Quality (Department of Environmental Quality)","edition":"effective December 17, 2021, as US EPA posts it in effect for CWA purposes (cover March 18, 2022; EPA requested more information only on definition 27 and the Ephemeral Stream reference)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/ms-wqs.pdf","source_sha256":"272701c5d5a2f8b10cf9c40fc50f5eb52f07753965d4aad7d23d360d4da34264","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"11 Miss. Admin. 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Code Pt. 6, Ch. 2 Surface Water Quality Criteria for Intrastate, Interstate and Coastal Waters: Table 2 numeric criteria (freshwater and saltwater acute/chronic, human health), dissolved oxygen, pH, class mineral criteria and waterbody-specific criteria","issuer":"State of Mississippi, Commission on Environmental Quality (Department of Environmental Quality)","edition":"effective December 17, 2021, as US EPA posts it in effect for CWA purposes (cover March 18, 2022; EPA requested more information only on definition 27 and the Ephemeral Stream reference)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/ms-wqs.pdf","source_sha256":"272701c5d5a2f8b10cf9c40fc50f5eb52f07753965d4aad7d23d360d4da34264","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"11 Miss. Admin. 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