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needed: Based on previous readings, oxygen's result of 9mg/L is outside the expected range of 5.03-8.97mg/L.","qa_admin_notes":"","qa_admin_notes_author_id":null,"qa_admin_notes_updated_at":null,"tested_parameters":["ph","oxygen","salinity","conductivity","water_temperature","total_dissolved_solids_tds"],"photos":[],"permalink":"https://data.waterrangers.com/observations/61468","readings":[{"id":"7e718acc-74a9-4721-abb7-749fa977a3f1","created_at":"2025-08-12T18:25:56.527Z","updated_at":"2025-08-12T18:25:56.527Z","parameter":"ph","unit":"std_units","value":"8.305","equipment":"water_rangers_freshwater_teststrips_ph","equipment_limit":null},{"id":"76b65be5-b654-4312-bca8-5893eadc7773","created_at":"2025-08-12T18:25:56.541Z","updated_at":"2025-08-12T18:25:56.541Z","parameter":"oxygen","unit":"mg_l","value":"9","equipment":"chemetrics_dissolved_oxygen_mg_l","equipment_limit":null},{"id":"cb779ae0-1b42-491f-8f3a-fb6931a8a4f4","created_at":"2025-08-12T18:25:56.556Z","updated_at":"2025-08-12T18:25:56.556Z","parameter":"salinity","unit":"ppm","value":"0.15","equipment":"water_rangers_pen_type_salinity_meter_ppm","equipment_limit":null},{"id":"ca2ccc04-f938-4514-a24d-5c41b558b800","created_at":"2025-08-12T18:25:56.572Z","updated_at":"2025-08-12T18:25:56.572Z","parameter":"conductivity","unit":"us_cm","value":"771.5","equipment":"water_rangers_pen_type_conductivity_meter_low_range","equipment_limit":null},{"id":"1a9087ba-726d-4fc2-8a73-9b8615d1e62d","created_at":"2025-08-12T18:25:56.594Z","updated_at":"2025-08-12T18:25:56.594Z","parameter":"water_temperature","unit":"deg_c","value":"23.86302","equipment":"water_rangers_pen_type_temperature_meter","equipment_limit":null},{"id":"cf887853-f0c7-4b58-8606-a9b9b4d73fc1","created_at":"2025-08-12T18:25:56.599Z","updated_at":"2025-08-12T18:25:56.599Z","parameter":"total_dissolved_solids_tds","unit":"ppm","value":"543","equipment":"other_pen-type_tds_meter","equipment_limit":null}]},{"id":"101a44ef-7d53-4e92-94e6-86a644ce9f22","created_at":"2025-08-12T18:25:56.195Z","updated_at":"2026-01-20T19:58:14.786Z","owner_id":"b0beb858-d4da-482e-aafb-45c504837f31","location_id":"3f533625-87b7-42ae-ad91-b9dda6ebc387","dataset_id":"d2fe54dd-eb11-4fa3-8832-ae4b06735c06","form_id":"15a1a013-1018-477d-8402-0cb04fc583b3","observed_at":"2021-06-28T00:00:00.000Z","observed_at_local":"2021-06-27T20:00:00-04:00","notes":null,"checked":"review_needed","qa_notes":"Review needed: Based on previous readings, oxygen's result of 4mg/L is outside the expected range of 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