All nitrate concentrations presented here will be for the ion only (i.e., as mg NO₃^‑·L^‑1).  Conversion factors for some of the commonly reported units in the literature are provided in the factsheet.

For protection from direct toxic effects; the guidelines do not consider indirect effects due to eutrophication.

Derived from toxicity tests utilizing NaNO₃

Derived with severe-effects data (such as lethality) and are not intended to protect all components of aquatic ecosystem structure and function but rather to protect most species against lethality during severe but transient events (e.g. inappropriate application or disposal of the substance of concern).

All nitrate concentrations presented here will be for the ion only (i.e., as mg NO₃^‑·L^‑1).  Conversion factors for some of the commonly reported units in the literature are provided in the factsheet.

For protection from direct toxic effects; the guidelines do not consider indirect effects due to eutrophication.

Derived from toxicity tests utilizing NaNO₃.

Derived with mostly no- and some low-effect data and are intended to protect against negative effects to aquatic ecosystem structure and function during indefinite exposures (e.g. abide by the guiding principle as per CCME 2007).

All nitrate concentrations presented here will be for the ion only (i.e., as mg NO₃^‑·L^‑1).  Conversion factors for some of the commonly reported units in the literature are provided in the factsheet.

For protection from direct toxic effects; the guidelines do not consider indirect effects due to eutrophication.

Derived from toxicity tests utilizing NaNO₃ and KNO₃.

Derived with severe-effects data (such as lethality) and are not intended to protect all components of aquatic ecosystem structure and function but rather to protect most species against lethality during severe but transient events (e.g. inappropriate application or disposal of the substance of concern).

All nitrate concentrations presented here will be for the ion only (i.e., as mg NO₃^‑·L^‑1).  Conversion factors for some of the commonly reported units in the literature are provided in the factsheet.

For protection from direct toxic effects; the guidelines do not consider indirect effects due to eutrophication.

Derived from toxicity tests utilizing NaNO₃ and KNO₃.

Derived with mostly no- and some low-effect data and are intended to protect against negative effects to aquatic ecosystem structure and function during indefinite exposures (e.g. abide by the guiding principle as per CCME 2007).