{"query":{"parameter":"hydrogen sulphide","place":"CA-NS","medium":null,"statistic":null,"kind":null},"searched":{"places":["CA-NS","CA"],"parameter_keys":["cas:7783-06-4","name:hydrogen sulphide","cas:3547-33-9","cas:538-74-9","cas:97-74-5","cas:463-58-1","cas:115408-95-2","cas:592-88-1","cas:544-40-1","cas:352-93-2","cas:75-18-3","cas:111-47-7","cas:3698-89-3","cas:2469-45-6","cas:3698-94-0","cas:420-12-2","cas:6294-31-1","cas:625-80-9","cas:2690-08-6","cas:7446-34-6","cas:18496-25-8","name:sulfide, easily liberated","name:undisassociated hydrogen sulfide","name:sulfides, total","name:sulfure d’hydrogene"],"names_matched":[["hydrogen sulphide","cas:7783-06-4"],["hydrogen sulphide","name:hydrogen sulphide"],["2 hydroxyethyl octyl sulfide","cas:3547-33-9","sulfide"],["benzyl sulfide","cas:538-74-9","sulfide"],["bis dimethylthiocarbamoyl sulfide","cas:97-74-5","sulfide"],["carbonyl sulfide","cas:463-58-1","sulfide"],["cyclohexene 4 ethenyl reaction products with hydrogen sulfide h2s","cas:115408-95-2","sulfide"],["diallyl sulfide","cas:592-88-1","sulfide"],["dibenzyl sulfide","cas:538-74-9","sulfide"],["dibutyl sulfide","cas:544-40-1","sulfide"],["diethyl sulfide","cas:352-93-2","sulfide"],["dimethyl sulfide","cas:75-18-3","sulfide"],["dipropyl sulfide","cas:111-47-7","sulfide"],["dodecyl methyl sulfide","cas:3698-89-3","sulfide"],["dodecyl sulfide","cas:2469-45-6","sulfide"],["ethyl n octyl sulfide","cas:3698-94-0","sulfide"],["ethylene sulfide","cas:420-12-2","sulfide"],["hexyl sulfide","cas:6294-31-1","sulfide"],["isopropyl sulfide","cas:625-80-9","sulfide"],["octyl sulfide","cas:2690-08-6","sulfide"],["selenium sulfide","cas:7446-34-6","sulfide"],["sulfide","cas:18496-25-8","sulfide"],["sulfide easily liberated","name:sulfide, easily liberated","sulfide"],["undisassociated hydrogen sulfide","name:undisassociated hydrogen sulfide","sulfide"],["diallyl sulfides","cas:592-88-1","sulfides"],["sulfides total","name:sulfides, total","sulfides"],["sulfure d hydrogene","name:sulfure d’hydrogene","sulfure d hydrogene"],["sulfure d hydrogene h2s","name:sulfure d’hydrogene","sulfure d hydrogene"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":5,"offset":0,"returned":5,"next_offset":null,"rows":[{"id":"881fe70a9a9c8de7","parameter":"Hydrogen Sulphide","value":"2","value_num":2,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:hydrogen sulphide","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":2,"quote":null}},{"id":"661bde38ae69d352","parameter":"Sulfide","value":"0.1","value_num":0.1,"unit":"lb per 1,000 barrels of crude oil (× the refinery's reference crude rate)","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7783-06-4","place":["CA"],"conditions":["cites is PRLER","route is direct"],"cite":{"instrument":"ca_prler","title":"Petroleum Refinery Liquid Effluent Regulations (C.R.C., c. 828) — Schedule I authorized deposits","issuer":"Government of Canada (Fisheries Act; Environment and Climate Change Canada)","edition":"Justice Laws Website, current to 2026-09-21","source_url":"https://laws-lois.justice.gc.ca/eng/regulations/C.R.C.,_c._828/FullText.html","source_sha256":"30e528bdc3a3546afb3defff4dae9b1dacb362e192680e127bd788d7f97c8ce8","fetched_at":"2026-10-08","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Schedule I, Column II: monthly amount (the month's mean of daily authorized deposits, s. 7)","page":null,"quote":"3 Sulfide 0.1 0.3 0.5"}},{"id":"ef089235b3642a46","parameter":"Sulfide","value":"0.3","value_num":0.3,"unit":"lb per 1,000 barrels of crude oil (× the refinery's reference crude rate)","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7783-06-4","place":["CA"],"conditions":["cites is PRLER","route is direct","the actual deposit may exceed it on no more than one day in each month (s. 5(1)(b))"],"cite":{"instrument":"ca_prler","title":"Petroleum Refinery Liquid Effluent Regulations (C.R.C., c. 828) — Schedule I authorized deposits","issuer":"Government of Canada (Fisheries Act; Environment and Climate Change Canada)","edition":"Justice Laws Website, current to 2026-09-21","source_url":"https://laws-lois.justice.gc.ca/eng/regulations/C.R.C.,_c._828/FullText.html","source_sha256":"30e528bdc3a3546afb3defff4dae9b1dacb362e192680e127bd788d7f97c8ce8","fetched_at":"2026-10-08","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"Schedule I, Column III: one day amount — not exceeded on more than one day in a month (s. 8(1))","page":null,"quote":"3 Sulfide 0.1 0.3 0.5"}},{"id":"d466464baa68b45a","parameter":"Sulfide","value":"0.5","value_num":0.5,"unit":"lb per 1,000 barrels of crude oil (× the refinery's reference crude rate)","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7783-06-4","place":["CA"],"conditions":["cites is PRLER","route is direct"],"cite":{"instrument":"ca_prler","title":"Petroleum Refinery Liquid Effluent Regulations (C.R.C., c. 828) — Schedule I authorized deposits","issuer":"Government of Canada (Fisheries Act; 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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 (Hydrogen Sulphide, published or reaffirmed 2025)","page":null,"quote":"I Hydrogen Sulphide (2025) (In: Operational parameters) None AO: ≤ 0.05"}}],"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: \"hydrogen sulphide\", 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; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}