{"query":{"parameter":"2 4 d","place":"CA-NS","medium":null,"statistic":null,"kind":null},"searched":{"places":["CA-NS","CA"],"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-","name:2,4 dichlorophenoxyacetic acid"],"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-"],["2 4 dichlorophenoxyacetic acid","name:2,4 dichlorophenoxyacetic acid","2 4 dichlorophenoxyacetic acid"],["2 4 dichlorophenoxy acetic acid","name:2,4-dichlorophenoxy-acetic acid","2 4 dichlorophenoxy acetic acid"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":3,"offset":0,"returned":3,"next_offset":null,"rows":[{"id":"97a4bbb6b5d3ad5f","parameter":"2,4-D","value":"4","value_num":4,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:2,4-d","place":["CA-NS"],"conditions":["receiving_water is freshwater","a site's surface water, or groundwater within 10 m of a surface water body, assessed under the Contaminated Sites Regulations (Tier I: the generic standard; a Tier II pathway-specific standard or a site-specific risk assessment may replace it)"],"cite":{"instrument":"ca_ns_tier1_eqs_surface_water","title":"Nova Scotia Tier I Environmental Quality Standards (EQS) for Surface Water and Groundwater Discharging to Surface Water — Table 3, surface water columns","issuer":"Nova Scotia Environment and Climate Change (Contaminated Sites Regulations, Tier I EQS)","edition":"Revision September 30, 2021 (linked from the Contaminated Sites protocols page, fetched 2026-10-09)","source_url":"https://novascotia.ca/nse/contaminatedsites/docs/Table_3_-_Nova_Scotia_Tier_I_Environmental_Quality_Standards_EQS_for_Surface_Water_and_Groundwater_Discharging_to_Surface_Water.pdf","source_sha256":"cff66750079c1998ad86f5ad70089705f7824849c0b5a016eb5253447301a875","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Table 3, surface water, fresh water","page":4,"quote":null}},{"id":"c7590a1d3b5a409a","parameter":"2,4-D","value":"4","value_num":4,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:2,4-d","place":["CA-NS"],"conditions":["receiving_water is marine","a site's surface water, or groundwater within 10 m of a surface water body, assessed under the Contaminated Sites Regulations (Tier I: the generic standard; a Tier II pathway-specific standard or a site-specific risk assessment may replace it)"],"cite":{"instrument":"ca_ns_tier1_eqs_surface_water","title":"Nova Scotia Tier I Environmental Quality Standards (EQS) for Surface Water and Groundwater Discharging to Surface Water — Table 3, surface water columns","issuer":"Nova Scotia Environment and Climate Change (Contaminated Sites Regulations, Tier I EQS)","edition":"Revision September 30, 2021 (linked from the Contaminated Sites protocols page, fetched 2026-10-09)","source_url":"https://novascotia.ca/nse/contaminatedsites/docs/Table_3_-_Nova_Scotia_Tier_I_Environmental_Quality_Standards_EQS_for_Surface_Water_and_Groundwater_Discharging_to_Surface_Water.pdf","source_sha256":"cff66750079c1998ad86f5ad70089705f7824849c0b5a016eb5253447301a875","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Table 3, surface water, marine water","page":4,"quote":null}},{"id":"4c653e0eb34d40a8","parameter":"2,4-Dichlorophenoxy acetic acid (2,4-D)","value":"0.1","value_num":0.1,"unit":"mg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:94-75-7","place":["CA"],"conditions":["drinking water (a guideline, not a regulation: each province and territory decides whether, and how, it binds there)"],"cite":{"instrument":"ca_hc_gcdwq","title":"Health Canada — Guidelines for Canadian Drinking Water Quality, Summary Tables 1-3 (microbiological, chemical and physical, radiological)","issuer":"Health Canada, with the Federal-Provincial-Territorial Committee on Drinking Water","edition":"page modified 2026-01-21 (dcterms.modified; issued 2014-10-22): Tables 1-3 as the browser pane rendered them on 2026-10-15","source_url":"https://www.canada.ca/en/health-canada/services/environmental-workplace-health/reports-publications/water-quality/guidelines-canadian-drinking-water-quality-summary-table.html","source_sha256":"9451ad8bfa566c0625ae4fcb362272cbb0e20040c548540f362488118c300b89","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Table 2, Chemical and Physical Parameters (2,4-Dichlorophenoxy acetic acid (2,4-D), published or reaffirmed 2022)","page":null,"quote":"P 2,4-Dichlorophenoxy acetic acid (2,4-D) (2022) 0.1 None"}}],"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":"CA-NS"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"2 4 d\", 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":"CA-NS"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; 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