Environmental Values, Water Quality Objectives,Aquatic Ecosystem Health reporting

no/minor impact moderate impact major/verymajorimpact

Example Site

Selected reference site locations are indicated bynumbers on the right-hand side of the riskassessment diagrams

Environmental FlowObjectives:

The deviation below thisEFO should be minimized asthere may be an increasedrisk of unacceptableenvironmental degradation.

Environmental Protection (Water) Policy 1997

What are EnvironmentalValues (EVs)?

EVs are the qualities of a water thatsupport:

(A) aquatic ecosystems and

(B) human uses/values

All waterways will possess the aquaticecosystem EV and in most cases,other human uses/values will alsoapply.

EVs are protected from the effects ofpollutants by achieving water qualityobjectives

Stock watering

Primary Recreation

Irrigation

Farm Supply

Industrial Use

HUMAN USE EVsAQUATIC

ECOSYSTEMEV

What are Water QualityObjectives (WQOs)?

Measures of water qualityindicators (physical, chemical, orbiological measures) that protectthe environmental values of thewater

The WQO is the most stringentset of WQGs to support allidentified EVs

© 2009 SEQ Healthy Waterways Partnership

© 2009 SEQ Healthy Waterways Partnership

Ratings used to present averaged assessments in this report

RatingAverage difference from reference

conditionInterpretation

green In reference condition Good condition

yellow < 20 % Slightly disturbed condition

orange > 20% and < 50 % Moderately disturbed condition

red > 50 % Highly disturbed condition

grey No assessment available No assessment available