{"query":{"parameter":"2 4 d","place":"US-DE","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-DE","US"],"parameter_keys":["cas:94-75-7","name:2,4-d","name:2-4-d","cas:1929-73-3","name:2,4-dichlorophenoxy-acetic acid","name:chlorophenoxy herbicide","name:chlorophenoxy herbicides","name:d, 2,4-"],"names_matched":[["2 4 d","cas:94-75-7"],["2 4 d","name:2,4-d"],["2 4 d","name:2-4-d"],["2 4 d bee","cas:1929-73-3"],["2 4 dichlorophenoxy acetic acid 2 4 d","name:2,4-dichlorophenoxy-acetic acid"],["chlorophenoxy herbicide 2 4 d","name:chlorophenoxy herbicide"],["chlorophenoxy herbicides 2 4 d","name:chlorophenoxy herbicides"],["d 2 4 2 4 d 2 4 dichlorophenoxy acetic acid","name:d, 2,4-"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order; rows for a marine receiving water after the rest, as none of the place's own rows names a marine, salt, estuarine, coastal or ocean water"},"total":11,"offset":0,"returned":11,"next_offset":null,"rows":[{"id":"0d5d163e3f4ff0b8","parameter":"Chlorophenoxy Herbicide (2,4-D)","value":"70 (MCL)","value_num":70,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:chlorophenoxy herbicide","place":["US-DE"],"conditions":["waters designated Public Water Supply sources (Table 2 notes: 'Fish and Water Ingestion')"],"cite":{"instrument":"us_de_wqs","title":"7 DE Admin. 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SSL values are based on DAF=1"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","section":null,"page":null,"quote":null,"table":"ssl","column":"risque"}},{"id":"8dea7ddc8006ab60","parameter":"Dichlorophenoxy Acetic Acid, 2,4-","value":"0.018","value_num":0.018,"unit":"mg/kg","direction":"max","kind":"printed_reference","medium":"soil","level":"national","parameter_key":"cas:94-75-7","place":["US"],"conditions":["Protection of Groundwater SSLs: MCL-based SSL (mg/kg); SSL values are based on DAF=1"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","section":null,"page":null,"quote":null,"table":"ssl","column":"mcl"}},{"id":"762146315746d615","parameter":"Dichlorophenoxy Acetic Acid, 2,4-","value":"170","value_num":170,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:94-75-7","place":["US"],"conditions":["Tap Water (ug/L): Regional Screening Level (RSL) Summary Table (TR=1E-06, HQ=1) November 2024"],"cite":{"instrument":"us_rsl_tapwater","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Tap Water","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","section":null,"page":null,"quote":null,"table":"eau","column":"eau_robinet"}},{"id":"d5d249733314303f","parameter":"2,4-D","value":"0.07","value_num":0.07,"unit":"mg/l","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"name:2,4-d","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","section":"141.50, 141.61","page":null,"quote":null,"column":"mclg"}},{"id":"5fd765e70588510b","parameter":"2,4-D","value":"0.07","value_num":0.07,"unit":"mg/l","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"name:2,4-d","place":["US"],"conditions":["40 CFR 141.2: Maximum contaminant level means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."],"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","section":"141.50, 141.61","page":null,"quote":null,"column":"mcl"}},{"id":"b9ff7bd0b4dd0789","parameter":"Chlorophenoxy Herbicide (2,4-D)","value":"12,000","value_num":12000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"national","parameter_key":"cas:94-75-7","place":["US"],"conditions":["EPA's recommendation under Clean Water Act § 304(a): 'State and Tribal governments may use these criteria or use them as guidance in developing their own' — it binds a water once the state adopts it for the water's designated use","receiving_water is marine","consumption of organism only: a water designated for fish and shellfish taken from it, not a drinking-water source (fresh or salt)"],"cite":{"instrument":"us_nrwqc_human_health","title":"EPA National Recommended Water Quality Criteria — Human Health Criteria Table (water + organism, organism only)","issuer":"U.S. Environmental Protection Agency","edition":"EPA web table (fetched 2026-10-09); 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or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}