{"query":{"parameter":"radium 226","place":"US-SD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-SD","US"],"parameter_keys":["cas:13982-63-3","name:radium 226","name:radium-226","name:combined radium-226 and radium-228","name:gross alpha particle activity","name:gross alpha particles including radium-226,but not radon or uranium","name:radioactive substances","name:radium 226 and 228 combined","name:radium-226 and -228","name:radium 226 and radium 228","name:radium 226 + radium 228","name:radium-226 + radium-228"],"names_matched":[["radium 226","cas:13982-63-3"],["radium 226","name:radium 226"],["radium 226","name:radium-226"],["combined radium 226 and radium 228","name:combined radium-226 and radium-228"],["gross alpha particle activity including radium 226 but excluding radon and uranium","name:gross alpha particle activity"],["gross alpha particle activity including radium 226 excluding radon and uranium","name:gross alpha particle activity"],["gross alpha particles including radium 226 but not radon or uranium","name:gross alpha particles including radium-226,but not radon or uranium"],["radioactive substances combined radium 226 and 228","name:radioactive substances"],["radioactive substances gross alpha particle activity including radium 226 but excluding radon and uranium","name:radioactive substances"],["radium 226 and 228","name:radium 226 and 228 combined"],["radium 226 and 228","name:radium-226 and -228"],["radium 226 and 228 combined","name:radium 226 and 228 combined"],["radium 226 and 228 combined","name:radium-226 and -228"],["radium 226 and radium 228","name:radium 226 and radium 228"],["radium 226 radium 228","name:radium 226 + radium 228"],["radium 226 radium 228","name:radium-226 + radium-228"],["radium 226 radium 228 combined dissolved","name:radium 226 + radium 228"],["radium 226 radium 228 combined dissolved","name:radium-226 + radium-228"],["radium 226 radium 228 combined total","name:radium 226 + radium 228"],["radium 226 radium 228 combined total","name:radium-226 + radium-228"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":1,"names":["Gross alpha particle activity (excluding radon and uranium)"],"says":"1 rows share a parameter key with a longer name holding \"radium 226\" 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":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"53f15fd3ccb3154c","parameter":"Radium-226 (dissolved)","value":"radium-226, 5 pCi/L","value_num":5,"unit":"pCi/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:radium-226","place":["US-SD"],"conditions":["receiving_water is freshwater","all surface waters of the state"],"cite":{"instrument":"us_sd_wqs","title":"South Dakota Surface Water Quality Standards (ARSD 74:51:01): criteria by beneficial use, Appendix B toxic pollutant criteria, radionuclide and dissolved gas limits","issuer":"State of South Dakota, Water Management Board (Department of Agriculture and Natural Resources)","edition":"ARSD chapter 74:51:01, Surface Water Quality, effective August 17, 2023 (49 SDR 96, May 14, 2023 the latest amendment printed), as US EPA posts it in effect for CWA purposes","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/sd-wqs.pdf","source_sha256":"84e4cd1bcfc7954e7393230459ee9d98f7b9c39e0b29724e6b897bdb73f4ddcc","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"ARSD 74:51:01:14","page":11,"quote":"The average dissolved concentrations including the naturally occurring or background concentrations of iodine-131, radium-226, strontium-89, strontium-90, and tritium may not exceed the following concentration limits: iodine-131, 5 pCi/L; radium-226, 5 pCi/L; strontium-89, 100 pCi/L; strontium-90, 10 pCi/L; and tritium, 300 pCi/L."}},{"id":"d8ec670091851ba3","parameter":"Combined radium-226 and radium-228","value":"Zero","value_num":0,"direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"name:combined radium-226 and radium-228","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level goals are nonenforceable health goals."],"cite":{"instrument":"us_npdwr","title":"40 CFR Part 141 — National Primary Drinking Water Regulations (eCFR, as of 2026-08-01)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR as of 2026-08-01","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-40.xml?part=141","source_sha256":"bd534eb2d8af38e141e1cd6236134a638298fbf14791b30279eeb47d815d7767","fetched_at":"2026-08-29","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"141.55","page":null,"quote":null,"column":"mclg"}}],"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-SD"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"radium 226\", 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-SD"},"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"}]}