{"query":{"parameter":"dissolved oxygen","place":"US-WV","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-WV","US"],"parameter_keys":["cas:7782-44-7","name:dissolved oxygen","name:diel dissolved oxygen flux","name:minimum dissolved oxygen","name:chemical oxygen demand, arsenic, radium (dissolved and total, uranium, zinc","name:oxygen - dissolved","name:oxygen, dissolved"],"names_matched":[["dissolved oxygen","cas:7782-44-7"],["dissolved oxygen","name:dissolved oxygen"],["diel dissolved oxygen flux","name:diel dissolved oxygen flux"],["minimum dissolved oxygen","name:minimum dissolved oxygen"],["chemical oxygen demand arsenic radium dissolved and total uranium zinc","name:chemical oxygen demand, arsenic, radium (dissolved and total, uranium, zinc","oxygen dissolved"],["chemical oxygen demand arsenic radium dissolved and total uranium zinc h","name:chemical oxygen demand, arsenic, radium (dissolved and total, uranium, zinc","oxygen dissolved"],["oxygen dissolved","name:oxygen - dissolved","oxygen dissolved"],["oxygen dissolved","name:oxygen, dissolved","oxygen dissolved"],["oxygen dissolved intergravel","name:oxygen, dissolved","oxygen dissolved"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":9,"offset":0,"returned":9,"next_offset":null,"rows":[{"id":"c676b9035edcb863","parameter":"Dissolved oxygen","value":"not less than 5 mg/l at any time","value_num":5,"unit":"mg/L","statistic":"instant","direction":"min","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:dissolved oxygen","place":["US-WV"],"conditions":["receiving_water is freshwater","Category B1 (warm water fishery streams) and B4 (wetlands) waters (47CSR2 §6.3)"],"cite":{"instrument":"us_wv_wqs","title":"West Virginia 47CSR2 Requirements Governing Water Quality Standards: Appendix E Table 1 criteria by use category (aquatic life B1/B4 and B2 acute/chronic; human health C and A; all other uses)","issuer":"State of West Virginia, Department of Environmental Protection, Division of Water and Waste Management","edition":"the rule effective July 1, 2026 (authorized by SB256, passed 2/23/2026; Secretary of State final filing 3/4/2026). 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