{"query":{"parameter":"acrolein","place":"CA-ON","medium":null,"statistic":null,"kind":null},"searched":{"places":["CA-ON","CA"],"parameter_keys":["cas:107-02-8","cas:922-63-4"],"names_matched":[["acrolein","cas:107-02-8"],["2 ethyl acrolein","cas:922-63-4"]],"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":"651657cbf98bbe4e","parameter":"Acrolein","value":"4.5","value_num":4.5,"unit":"µg/m³","statistic":"hourly_avg","direction":"max","kind":"limit","medium":"ambient_air","level":"regional","parameter_key":"cas:107-02-8","place":["CA-ON"],"conditions":["averaging period: 1 hour","at a point of impingement: the concentration the discharge results in, or would result in according to an approved dispersion model (s. 20 (1), (2)); s. 20 binds every facility's discharges on or after February 1, 2020 (s. 20 (3)(e))"],"cite":{"instrument":"ca_on_419_05","title":"Ontario Regulation 419/05, Air Pollution — Local Air Quality — Schedule 3, standards with variable averaging periods","issuer":"Government of Ontario (Environmental Protection Act; Ministry of the Environment, Conservation and Parks)","edition":"consolidation period July 1, 2023 - e-Laws currency date; last amendment O. Reg. 90/22 (held snapshot of 2026-09-19, saved through the browser pane; e-Laws checked 2026-10-15: the same consolidation, currency date October 12, 2026)","source_url":"https://www.ontario.ca/laws/regulation/050419","source_sha256":"fb70ac7944efd8d2c48c508a8c045838d941dac28eb72b357b9a501b222ac17e","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Schedule 3, item 4","page":null,"quote":"4. 107-02-8 Acrolein 4.5 0.4 none"}},{"id":"2deafa21ca11492b","parameter":"Acrolein","value":"0.4","value_num":0.4,"unit":"µg/m³","statistic":"daily_avg","direction":"max","kind":"limit","medium":"ambient_air","level":"regional","parameter_key":"cas:107-02-8","place":["CA-ON"],"conditions":["averaging period: 24 hour","at a point of impingement: the concentration the discharge results in, or would result in according to an approved dispersion model (s. 20 (1), (2)); s. 20 binds every facility's discharges on or after February 1, 2020 (s. 20 (3)(e))"],"cite":{"instrument":"ca_on_419_05","title":"Ontario Regulation 419/05, Air Pollution — Local Air Quality — Schedule 3, standards with variable averaging periods","issuer":"Government of Ontario (Environmental Protection Act; Ministry of the Environment, Conservation and Parks)","edition":"consolidation period July 1, 2023 - e-Laws currency date; last amendment O. Reg. 90/22 (held snapshot of 2026-09-19, saved through the browser pane; e-Laws checked 2026-10-15: the same consolidation, currency date October 12, 2026)","source_url":"https://www.ontario.ca/laws/regulation/050419","source_sha256":"fb70ac7944efd8d2c48c508a8c045838d941dac28eb72b357b9a501b222ac17e","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"Schedule 3, item 4","page":null,"quote":"4. 107-02-8 Acrolein 4.5 0.4 none"}},{"id":"7e01841e0a64575b","parameter":"Acrolein","value":"0.03 µg/L","value_num":0.03,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:107-02-8","place":["CA-ON"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"ca_on_pwqo","title":"Provincial Water Quality Objectives (Ontario MOEE, Water Management: Policies, Guidelines, Provincial Water Quality Objectives, 1994) — Table 2, PWQOs and Interim PWQOs","issuer":"Ontario Ministry of Environment and Energy (MOEE; now Ministry of the Environment, Conservation and Parks)","edition":"MOEE July 1994 (reprinted February 1999), as published on ontario.ca (fetched 2026-10-09)","source_url":"https://www.ontario.ca/page/water-management-policies-guidelines-provincial-water-quality-objectives","source_sha256":"f4eddd3cd97cf5abb8678d040947bdaa2b4afae406f055948457d372d3b47931","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Appendix A, Table 2 — Table of PWQOs and Interim PWQOs","page":null,"quote":"Acrolein CAS No. 107-02-8 0.03 µg/L (Interim PWQO )"}}],"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-ON"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"acrolein\", 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-ON"},"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"}]}