{"query":{"parameter":"magnesium","place":"US-IA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-IA","US"],"parameter_keys":["cas:7439-95-4","cas:68648-08-8","cas:53320-86-8"],"names_matched":[["magnesium","cas:7439-95-4"],["fatty acids tall oil magnesium salts basic","cas:68648-08-8"],["lithium magnesium sodium silicate","cas:53320-86-8"],["tall oil fatty acids magnesium salts basic","cas:68648-08-8"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"c657583897dd88e4","parameter":"Magnesium","value":"800 mg/l","value_num":800,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7439-95-4","place":["US-IA"],"conditions":["receiving_water is freshwater","general waters (not designated): an end-of-pipe limit"],"cite":{"instrument":"us_ia_wqs","title":"Iowa Administrative Code 567—Chapter 61 Water Quality Standards: Table 1 criteria by use designation, Table 2 dissolved oxygen, pH, Table 4 sulfate, and the livestock-watering ion guidelines kept in effect","issuer":"State of Iowa, Environmental Protection Commission (Department of Natural Resources)","edition":"567 IAC chapter 61, effective February 2, 2022 (IAC 2/9/22), as US EPA posts it in effect for CWA purposes (cover February 13, 2023: 61.3(2)\"g\" kept in effect, EPA having reserved action on its removal; part of 61.3(3)(a)(1) disapproved)","source_url":"https://www.epa.gov/system/files/documents/2024-03/ia-chapter61-2023.pdf","source_sha256":"6d136ce607bf1fc6c839c1cea688892f0a113214bf6026fddab9f18e72d4c0d9","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"567 IAC 61.3(2)\"g\"","page":2,"quote":"Magnesium 800"}},{"id":"aff195e9555fe5a1","parameter":"Magnesium","value":"800 mg/l","value_num":800,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7439-95-4","place":["US-IA"],"conditions":["receiving_water is freshwater","designated waters: met at the boundary of the mixing zone"],"cite":{"instrument":"us_ia_wqs","title":"Iowa Administrative Code 567—Chapter 61 Water Quality Standards: Table 1 criteria by use designation, Table 2 dissolved oxygen, pH, Table 4 sulfate, and the livestock-watering ion guidelines kept in effect","issuer":"State of Iowa, Environmental Protection Commission (Department of Natural Resources)","edition":"567 IAC chapter 61, effective February 2, 2022 (IAC 2/9/22), as US EPA posts it in effect for CWA purposes (cover February 13, 2023: 61.3(2)\"g\" kept in effect, EPA having reserved action on its removal; part of 61.3(3)(a)(1) disapproved)","source_url":"https://www.epa.gov/system/files/documents/2024-03/ia-chapter61-2023.pdf","source_sha256":"6d136ce607bf1fc6c839c1cea688892f0a113214bf6026fddab9f18e72d4c0d9","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"567 IAC 61.3(2)\"g\"","page":2,"quote":"Magnesium 800"}}],"next":[{"tool":"check_values","says":"Has your user measured this? check_values sets each of their results beside every row held here, with a verdict and the row's cite.","arguments":{"place":"US-IA"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"magnesium\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"US-IA"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}