{"query":{"parameter":"dichloroethylenes","place":"US-DC","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-DC","US"],"parameter_keys":["cas:25323-30-2","name:dichloroethylenes"],"names_matched":[["dichloroethylenes","cas:25323-30-2"],["dichloroethylenes","name:dichloroethylenes"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":1,"offset":0,"returned":1,"next_offset":null,"rows":[{"id":"a7efa1ce990795cd","parameter":"Dichloroethylenes","value":"1000","value_num":1000,"unit":"µg/L","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:dichloroethylenes","place":["US-DC"],"conditions":["receiving_water is freshwater","Class C waters (protection and propagation of fish, shellfish, and wildlife; 21 DCMR 1101.1)"],"cite":{"instrument":"us_dc_wqs","title":"District of Columbia Water Quality Standards, 21 DCMR Chapter 11: §1104.8 Tables 1-3 (conventional constituents; Class C aquatic life CMC/CCC and Class D human health criteria for metals and organics)","issuer":"District of Columbia, Department of Energy and Environment","edition":"21 DCMR Chapter 11 as US EPA posts it in effect for CWA purposes (EPA's page lists it 'Effective December 17, 2025'; the posted file is dated 2025-06)","source_url":"https://www.epa.gov/system/files/documents/2025-06/dc_wqs.pdf","source_sha256":"a156fb1d7d915143baca625f2d21999f2cffde52ded465302748658d490501d5","fetched_at":"2026-10-10","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"21 DCMR 1104.8 Table 3","page":15,"quote":null}}],"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-DC"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"dichloroethylenes\", 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-DC"},"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"}]}