{"query":{"parameter":"beta endosulfan","place":"US-RI","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-RI","US"],"parameter_keys":["cas:33213-65-9","name:beta-endosulfan","name:alpha-endosulfan beta-endosulfan","name:b-endosulfan","cas:115-29-7"],"names_matched":[["beta endosulfan","cas:33213-65-9"],["beta endosulfan","name:beta-endosulfan"],["alpha endosulfan beta endosulfan","name:alpha-endosulfan beta-endosulfan"],["b endosulfan","name:b-endosulfan","b endosulfan"],["endosulfan beta","cas:115-29-7","endosulfan beta"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":4,"names":["Endosulfan"],"says":"4 rows share a parameter key with a longer name holding \"beta endosulfan\" 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":14,"offset":0,"returned":14,"next_offset":null,"rows":[{"id":"cebbfc1ce32f9bb4","parameter":"Endosulfan, beta","value":"0.22$","value_num":0.22,"unit":"µg/L","statistic":"instant","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:33213-65-9","place":["US-RI"],"conditions":["receiving_water is freshwater","fresh waters (salinity 1 ppt or less; brackish 1-10 ppt takes the more stringent)"],"cite":{"instrument":"us_ri_wqs","title":"250-RICR-150-05-1 Water Quality Regulations (Rhode Island), § 1.26(J) acute and chronic aquatic life criteria for freshwater and saltwater and human health criteria; § 1.10 class pH","issuer":"State of Rhode Island, Department of Environmental Management","edition":"effective January 13, 2026, as US EPA posts it in effect for Clean Water Act purposes (the chronic mercury revisions and the freshwater xylene criteria still under EPA review)","source_url":"https://www.epa.gov/system/files/documents/2026-04/rhode-island-wqs.pdf","source_sha256":"6a4f444874a8d35b77506ed07b9c2f70c467c8fef3325b8a09ddfc78df5b3743","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"250-RICR-150-05-1 § 1.26(J)","page":169,"quote":null}},{"id":"c0d0da61856dbd8e","parameter":"Endosulfan, beta","value":"0.056","value_num":0.056,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:33213-65-9","place":["US-RI"],"conditions":["receiving_water is freshwater","fresh waters (salinity 1 ppt or less)"],"cite":{"instrument":"us_ri_wqs","title":"250-RICR-150-05-1 Water Quality Regulations (Rhode Island), § 1.26(J) acute and chronic aquatic life criteria for freshwater and saltwater and human health criteria; 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