{"query":{"parameter":"formaldehyde","place":"CA-ON","medium":null,"statistic":null,"kind":null},"searched":{"places":["CA-ON","CA"],"parameter_keys":["cas:50-00-0","cas:129828-31-5","cas:178603-70-8","cas:67905-91-3","cas:68891-01-0","cas:870-72-4","cas:96591-17-2","cas:68891-75-8","cas:107-16-4","cas:30704-64-4","cas:37523-33-4","cas:69178-40-1","cas:52613-22-6","cas:25155-81-1","cas:68610-97-9","cas:147060-74-0","cas:153795-76-7","cas:68442-91-1","cas:68188-40-9"],"names_matched":[["formaldehyde","cas:50-00-0"],["2 propenoic acid polymer with 4 1 1 dimethylethyl phenol formaldehyde 2 5 furandione 2 methyloxirane 4 nonylphenol and oxirane","cas:129828-31-5"],["2 propenoic acid polymer with 4 1 1 dimethylethyl phenol formaldehyde 2 5 furandione 2 methyloxirane and oxirane","cas:178603-70-8"],["2 propenoic acid polymer with 4 1 1 dimethylethyl phenol formaldehyde 2 5 furandione methyloxirane 4 nonylphenol and oxirane","cas:129828-31-5"],["2 propenoic acid polymer with 4 1 1 dimethylethyl phenol formaldehyde 2 5 furandione methyloxirane and oxirane","cas:178603-70-8"],["2 propenoic acid polymer with formaldehyde 2 5 furandione methyloxirane 4 nonylphenol and oxirane","cas:67905-91-3"],["benzenesulfonamide ar methyl polymer with formaldehyde and 1 3 5 triazine 2 4 6 triamine butylated","cas:68891-01-0"],["bisulfite formaldehyde de sodium","cas:870-72-4"],["fatty acids linseed oil reaction products with 2 amino 2 hydroxymethyl 1 3 propanediol and formaldehyde polymers with bu methacrylate 2 diethylamino ethyl methacrylate 2 hydroxyethyl acrylate and me methacrylate","cas:96591-17-2"],["fatty acids tall oil esters with ethoxylated propoxylated formaldehyde p tert pentylphenol poly","cas:68891-75-8"],["fatty acids tall oil esters with ethoxylated propoxylated formaldehyde p tert pentylphenol polymer","cas:68891-75-8"],["formaldehyde cyanohydrin","cas:107-16-4"],["formaldehyde p tert butylphenol propylene oxide ethylene oxide polymer","cas:30704-64-4"],["formaldehyde polymer with 2 methyloxirane and 4 nonylphenol","cas:37523-33-4"],["formaldehyde polymer with benzenamine and 2 ethylbenzenamine","cas:69178-40-1"],["formaldehyde polymer with dimethylnaphthalene","cas:52613-22-6"],["formaldehyde polymer with methylbenzene","cas:25155-81-1"],["formaldehyde polymer with nonylphenol reaction products with diethanolamine and propylene oxide","cas:68610-97-9"],["formaldehyde polymer with nonylphenol reaction products with diethanolamine and propylene oxidea","cas:68610-97-9"],["formaldehyde polymers with branched 4 nonylphenol","cas:147060-74-0"],["formaldehyde polymers with branched 4 nonylphenol ethylene oxide and propylene oxide","cas:153795-76-7"],["formaldehyde propylene oxide p nonylphenol polymer","cas:37523-33-4"],["formaldehyde reaction products with glycerol","cas:68442-91-1"],["melamine formaldehyde","cas:68891-01-0"],["p tert butylphenol formaldehyde resin copolymer with ethylene oxide and propylene oxide","cas:30704-64-4"],["produits de reaction d acides gras de tallol avec l acetophenone le formaldehyde et la thiouree chlorhydrates","cas:68188-40-9"],["produits de reaction du glycerol et de la formaldehyde","cas:68442-91-1"],["reaction products of tall oil fatty acids with acetophenone formaldehyde and thiourea hydrochlorides","cas:68188-40-9"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":2,"offset":0,"returned":2,"next_offset":null,"rows":[{"id":"fa81ed1a8e56b08b","parameter":"Formaldehyde","value":"65","value_num":65,"unit":"µg/m³","statistic":"daily_avg","direction":"max","kind":"limit","medium":"ambient_air","level":"regional","parameter_key":"cas:50-00-0","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 43","page":null,"quote":"43. 50-00-0 Formaldehyde none 65 none"}},{"id":"21ee2b6cc3e81d5f","parameter":"Formaldehyde","value":"0.8 µg/L","value_num":0.8,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:50-00-0","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":"Formaldehyde CAS No. 50-00-0 0.8 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: \"formaldehyde\", 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"}]}