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Dissolved oxygen limits and guidelines in British Columbia (CA-BC)

8 numeric limits and guidelines for dissolved oxygen held for British Columbia and the place above it, from 2 instruments, each cited to its instrument, edition, section or page and quoted text. The register was built from 247 instruments. Everything held for British Columbia

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For programs: this page as JSON at /api/v1/limits?parameter=dissolved%20oxygen&place=CA-BC; the same at https://passage-data.com/mcp, a remote MCP server (tool find_limits). Every tool · llms.txt · OpenAPI

British Columbia (CA-BC): 6 rows

ParameterValueUnitStatisticGovernsApplies whenCite
Oxygen (dissolved)5 (minimum)mg/Lsurface water · guidelinereceiving water: freshwater
All life stages other than buried embryo/alevin.		B.C. Approved Water Quality Guidelines
Aquatic Life - Freshwater · Short-term acute · Approved (UniqueID 384)
384,Oxygen,Dissolved,EMS_DO_F,(7782-44-7),Aquatic Life - Freshwater,Water,Short-term acute,1,1,min,,,,All life stages other than buried embryo/alevin.,No Effect,Lower Limit,5,,mg/L
Oxygen (dissolved)9 (minimum)mg/Lsurface water · guidelinereceiving water: freshwater
Buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch. Water column concentrations recommended to achieve interstitial DO values when the latter are unavailable. Interstitial oxygen measurements supersede water column data.		B.C. Approved Water Quality Guidelines
Aquatic Life - Freshwater · Short-term acute · Approved (UniqueID 385)
385,Oxygen,Dissolved,EMS_DO_F,(7782-44-7),Aquatic Life - Freshwater,Water,Short-term acute,1,1,min,,,,Buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch. Water column concentrations recommended to achieve interstitial DO values when the latter are unavailable. Interstitial oxygen measurements supersede water column data… (431 characters; whole in the JSON)
Oxygen (dissolved)6 (minimum)mg/Lsurface water · guidelinereceiving water: freshwater
Interstitial DO concentrations for buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch.		B.C. Approved Water Quality Guidelines
Aquatic Life - Freshwater · Short-term acute · Approved (UniqueID 386)
386,Oxygen,Dissolved,EMS_DO_F,(7782-44-7),Aquatic Life - Freshwater,Water,Short-term acute,1,1,min,,,,Interstitial DO concentrations for buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch.,No Effect,Lower Limit,6,,mg/L
Oxygen (dissolved)8 (minimum)mg/Lmonthly averagesurface water · guidelinereceiving water: freshwaterB.C. Approved Water Quality Guidelines
Aquatic Life - Freshwater · Long-term chronic · Approved (UniqueID 387)
387,Oxygen,Dissolved,EMS_DO_F,(7782-44-7),Aquatic Life - Freshwater,Water,Long-term chronic,30,5,mean,,,,,No Effect,Lower Limit,8,,mg/L
Oxygen (dissolved)11 (minimum)mg/Lmonthly averagesurface water · guidelinereceiving water: freshwater
Buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch. Water column concentrations recommended to achieve interstitial DO values when the latter are unavailable. Interstitial oxygen measurements supersede water column data.		B.C. Approved Water Quality Guidelines
Aquatic Life - Freshwater · Long-term chronic · Approved (UniqueID 388)
388,Oxygen,Dissolved,EMS_DO_F,(7782-44-7),Aquatic Life - Freshwater,Water,Long-term chronic,30,5,mean,,,,Buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch. Water column concentrations recommended to achieve interstitial DO values when the latter are unavailable. Interstitial oxygen measurements supersede water column d… (435 characters; whole in the JSON)
Oxygen (dissolved)8 (minimum)mg/Lmonthly averagesurface water · guidelinereceiving water: freshwater
Interstitial DO concentrations for buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch.		B.C. Approved Water Quality Guidelines
Aquatic Life - Freshwater · Long-term chronic · Approved (UniqueID 389)
389,Oxygen,Dissolved,EMS_DO_F,(7782-44-7),Aquatic Life - Freshwater,Water,Long-term chronic,30,5,mean,,,,Interstitial DO concentrations for buried embryo/alevin life stages; instream concentrations from spawning to the point of yolk sax absorption or 30 days post hatch.,No Effect,Lower Limit,8,,mg/L

Canada (CA): 2 rows

ParameterValueUnitStatisticGovernsApplies whenCite
Dissolved oxygenVariableµg/Lsurface water · guidelinereceiving water: freshwater
long-term exposure: CCME's long-term guideline		CCME Canadian Water Quality Guidelines for the Protection of Aquatic Life
Dissolved oxygen>8000 & Narrative (minimum)µg/Lsurface water · guidelinereceiving water: marine
long-term exposure: CCME's long-term guideline		CCME Canadian Water Quality Guidelines for the Protection of Aquatic Life

Not held here: a discharge permit's own limits, and any rule for dissolved oxygen outside the 16 instruments we hold for this place and the places above it. A row missing here is missing from our sources, not from the law.

Free check: send your permit or your lab results, and we check each number against these rows, every verdict cited to its page, by email within 5 business days. Or send the link to a rule we do not hold: we read it and cite it by page.

What was searched

Every instrument we hold for British Columbia (CA-BC) and the place above it, Canada (CA): 16 instruments, for every parameter name matching “dissolved oxygen”: dissolved oxygen, oxygen dissolved, minimum dissolved oxygen, diel dissolved oxygen flux, oxygen dissolved intergravel, chemical oxygen demand arsenic radium dissolved and total uranium zinc, chemical oxygen demand arsenic radium dissolved and total uranium zinc h.

  1. B.C. Approved Water Quality Guidelines: Aquatic Life — freshwater, marine and estuarine, short-term acute and long-term chronic · Government of British Columbia, Ministry of Environment and Parks (Water Protection and Sustainability Branch) · BC Data Catalogue 'Water Quality Guidelines of B.C.' (all_wqgs.csv), dataset modified 2026-08-20; the same guidelines as the ministry's Guideline Summary PDF, whose host www2.gov.bc.ca refused this machine on 2026-10-09 · source sha256 1673409ad5c17fa364589bb20f830055bc21d6e765a40681f06b510f6614f26a — 6 rows here
  2. CCME Canadian Water Quality Guidelines for the Protection of Aquatic Life — freshwater and marine, short and long term · Canadian Council of Ministers of the Environment (CCME) · Summary Table (as served 2026-09-24; each guideline carries its own year) · source sha256 f484a5f2a2dfcb5a4257763c853fc8dc810788cec54c75355b30ec194e2f7499 — 2 rows here
14 instruments searched with no row for it
  1. B.C. Reg. 375/96 Contaminated Sites Regulation — Schedule 3.1 Parts 1, 2 and 3, matrix and generic numerical soil standards · Government of British Columbia (Environmental Management Act) · This consolidation is current to September 15, 2026. · source sha256 f69b12b38ce71f5bad4842242a2390be2eeeef94ac7fcc116d57c4e34d6ffc21 — no row here
  2. B.C. Reg. 375/96 Contaminated Sites Regulation — Schedule 3.2 generic numerical water standards, aquatic life (freshwater and marine) · Government of British Columbia (Environmental Management Act) · This consolidation is current to September 15, 2026. · source sha256 f69b12b38ce71f5bad4842242a2390be2eeeef94ac7fcc116d57c4e34d6ffc21 — no row here
  3. B.C. Reg. 375/96 Contaminated Sites Regulation — Schedule 3.2 generic numerical water standards, drinking water, irrigation and livestock · Government of British Columbia (Environmental Management Act) · This consolidation is current to September 15, 2026. · source sha256 f69b12b38ce71f5bad4842242a2390be2eeeef94ac7fcc116d57c4e34d6ffc21 — no row here
  4. Municipal Wastewater Regulation (B.C. Reg. 87/2012) — s. 94 Tables 9-11 municipal effluent quality, s. 96 fecal coliforms, s. 97 phosphorus · Government of British Columbia (Environmental Management Act) · BC Laws consolidation current to October 6, 2026 (am. B.C. Reg. 50/2024) · source sha256 0fef8d2da18bd3698cb11c2b2d7296ff1c22405b93cc7128c52c6111d49e49a6 — no row here
  5. Canadian Ambient Air Quality Standards (CAAQS), environmental quality objectives under CEPA 1999 ss. 54(1) and 55(1): Objectives for Ambient PM2.5 and Ozone, Annex paras 1-4 and footnotes 1-2, Canada Gazette Part I, Vol. 147, No. 21, May 25, 2013 · Canada Gazette, Part I, Volume 147, Number 21: GOVERNMENT NOTICES May 25, 2013 · source — no row here
  6. CCME — Soil Quality Guidelines for the Protection of Environmental and Human Health (Summary Table, as served 2026-09-24) · Canadian Council of Ministers of the Environment (CCME) · Summary Table · source sha256 f484a5f2a2dfcb5a4257763c853fc8dc810788cec54c75355b30ec194e2f7499 — no row here
  7. Fisheries Act (R.S.C. 1985, c. F-14), s. 36(3) — no deposit of a deleterious substance in water frequented by fish; no value printed · Government of Canada (Fisheries Act; Environment and Climate Change Canada administers s. 36) · Justice Laws Website, current to 2026-09-21, last amended 2024-11-27 · source sha256 db95b0a149728b0f0b1e1b1314d87ecdf46a91e1edfec4a7006fc3cbe0080bd6 — no row here
  8. Health Canada, Objective for Canadian drinking water quality — per- and polyfluoroalkyl substances (published 2024-08-09) · Health Canada · Objective value · source sha256 32a42a0d382cdd90729dd9750f47889782bd00d4af8dfd34f2b9aaf6f2678c6c — no row here
  9. Metal and Diamond Mining Effluent Regulations (SOR/2002-222) — Schedule 4, maximum authorized concentrations · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 2c6e0151d3776378f73df4868ca98052882ee81faf9738bbeba6f5d544b648fe — no row here
  10. Meat and Poultry Products Plant Liquid Effluent Regulations (C.R.C., c. 818) — Schedule I authorized deposits · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 c60e2a2dfa9a10c2ddd314b391bf66215ad599732f38b4c5a15fe793d8c28841 — no row here
  11. Potato Processing Plant Liquid Effluent Regulations (C.R.C., c. 829) — Schedule I authorized deposits · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 691ca3953a6dd6ae66b4c72737944caa68ed76710447df642a16716dd25027a3 — no row here
  12. Pulp and Paper Effluent Regulations (SOR/92-269) — s. 14 maximum BOD and suspended solids · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 cc8432e6a4dd1834ff4dd43d5b5fb98f09b1f7af7952e36154febcc649504eb4 — no row here
  13. Petroleum Refinery Liquid Effluent Regulations (C.R.C., c. 828) — Schedule I authorized deposits · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21 · source sha256 30e528bdc3a3546afb3defff4dae9b1dacb362e192680e127bd788d7f97c8ce8 — no row here
  14. Wastewater Systems Effluent Regulations (SOR/2012-139) — s. 6 effluent quality · Government of Canada (Fisheries Act; Environment and Climate Change Canada) · Justice Laws Website, current to 2026-09-21, last amended 2026-06-04 · source sha256 0a60e10f783f7aca672792303dffcca1525133eb34eb32711543cb3cf4bbb955 — no row here

Read from public law and public agency files. A row missing here is missing from our sources, not from the law of the place. Check the cited source before relying on a value.