{"id":"1219f31e-a741-48c6-96bc-7d9e6a7adcea","created_at":"2025-09-04T14:40:58.884Z","updated_at":"2026-01-20T21:02:54.807Z","owner_id":"c4678375-5225-458c-b42f-15157046d480","location_id":"e28e69e7-894f-4dd7-bde0-577f0c4146a1","dataset_id":"f13843e3-100c-4126-a33c-8edb632a981b","form_id":"93e5d9c7-5c11-4eda-ab0f-2e1bcd433c0c","observed_at":"2018-07-23T04:00:00.000Z","observed_at_local":"2018-07-23T00:00:00-04:00","notes":null,"checked":"qc_complete","qa_notes":null,"qa_admin_notes":"","qa_admin_notes_author_id":null,"qa_admin_notes_updated_at":null,"tested_parameters":["total_phosphorus","calcium","total_kjeldahl_nitrogen"],"photos":[],"permalink":"https://data.waterrangers.com/observations/166699","readings":[{"id":"3705f9bc-d47c-46ba-b578-5c591bcdc51b","created_at":"2025-09-04T14:40:58.933Z","updated_at":"2025-09-04T14:40:58.933Z","parameter":"calcium","unit":"mg_l","value":"31.1","equipment":"unspecified_calcium","equipment_limit":null},{"id":"d99f8a4c-1a8e-4dfd-bf6c-085cf5f4f39b","created_at":"2025-09-04T14:40:58.985Z","updated_at":"2025-09-04T14:40:58.985Z","parameter":"total_kjeldahl_nitrogen","unit":"mg_l","value":"0.4","equipment":"lab_unspecified","equipment_limit":null},{"id":"f5a0253b-0ea1-450a-800a-2b3ad82c69b7","created_at":"2025-09-04T14:40:58.959Z","updated_at":"2025-11-19T15:02:42.142Z","parameter":"total_phosphorus","unit":"ppb","value":"0","equipment":"unspecified_total_phosphorus","equipment_limit":"<="}]}