Livestock

Water Quality

Ambient Water Quality Criteria for Colour in British Columbia: Technical Appendix

6. Livestock

6.1 Effects

To our knowledge, no known effects of colour to livestock have been documented.

6.2 Literature Criteria

There are no criteria specific to livestock watering available from any other jurisdiction. Alberta has set general criteria intended to protect most water uses (Alberta Environmental Protection 1994). It is not known, however, whether livestock watering will be protected by the Alberta criterion of no increases greater than 30 mg/L Pt above background.

6.3 Proposed Criteria

There is insufficient information to derive water quality criteria for apparent and true colour for this water use.

6.4 Rationale

The limited information on the toxicity of humic and fulvic acids to mammals (see Section 3.2) indicates that livestock are not likely to be adversely affected by coloured waters. If the water was to impart a toxic effect to livestock, it would be due to other physical, biological and/or chemical parameters in the water. Existing criteria for these parameters should protect livestock from being harmed.


	Water Quality Ambient Water Quality Criteria for Colour in British Columbia: Technical Appendix 6. Livestock 6.1 Effects To our knowledge, no known effects of colour to livestock have been documented. *6.2 Literature Criteria* There are no criteria specific to livestock watering available from any other jurisdiction. Alberta has set general criteria intended to protect most water uses (Alberta Environmental Protection 1994). It is not known, however, whether livestock watering will be protected by the Alberta criterion of no increases greater than 30 mg/L Pt above background. *6.3 Proposed Criteria* There is insufficient information to derive water quality criteria for apparent and true colour for this water use. *6.4 Rationale* The limited information on the toxicity of humic and fulvic acids to mammals (see Section 3.2) indicates that livestock are not likely to be adversely affected by coloured waters. If the water was to impart a toxic effect to livestock, it would be due to other physical, biological and/or chemical parameters in the water. Existing criteria for these parameters should protect livestock from being harmed.