{"query":{"parameter":"radium 228","place":"US-MT","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MT","US"],"parameter_keys":["cas:15262-20-1","name:radium 228","name:radium-228","name:combined radium-226 and radium-228","name:radioactive substances","name:radium-226 and -228","cas:7440-14-4","name:radium 226 and 228 combined","name:radium 226 and radium 228","name:radium-226 and radium-228","name:radium 226 + radium 228","name:radium-226 + radium-228"],"names_matched":[["radium 228","cas:15262-20-1"],["radium 228","name:radium 228"],["radium 228","name:radium-228"],["combined radium 226 and radium 228","name:combined radium-226 and radium-228"],["radioactive substances combined radium 226 and 228","name:radioactive substances"],["radium 226 and 228","name:radium-226 and -228"],["radium 226 and 228 combined","cas:7440-14-4"],["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 and radium 228","name:radium-226 and radium-228"],["radium 226 and radium 228 combined","name:radium 226 and radium 228"],["radium 226 and radium 228 combined","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"},"total":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"a253c98039b19c8f","parameter":"Radium 228","value":"5 picoC/ liter Note: The sum of Radium 226 and 228. MCL","value_num":5,"unit":"pCi/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:15262-20-1","place":["US-MT"],"conditions":["receiving_water is freshwater","Montana surface waters (human health surface water standard: water and fish consumption, 2.4 L and 22 g/day)","radium 226 and 228 summed"],"cite":{"instrument":"us_mt_wqs","title":"Montana Circular DEQ-7 Numeric Water Quality Standards: aquatic life acute and chronic and human health surface water standards; footnote (15) dissolved oxygen","issuer":"State of Montana, Department of Environmental Quality (Water Quality Division)","edition":"Circular DEQ-7, June 2019, as US EPA posts it in effect for CWA purposes (cover April 7, 2020; last EPA action April 23, 2018)","source_url":"https://www.epa.gov/sites/default/files/2014-12/documents/mt-deq7.pdf","source_sha256":"beda1c7ee072086eaa2da108a4d3432ea613a1f7477fd3e008755c4834ff6dd8","fetched_at":"2026-10-14","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Circular DEQ-7 (June 2019)","page":66,"quote":null}},{"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":"not verified"},"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-MT"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"radium 228\", 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-MT"},"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"}]}