When values lower than the minimum analytical detection level (MDL) are reported, the MDL value for that analysis
will be substituted on the chart. A data download will show for which dates the substitutions were made.
Please select a sample location.
Note: Conventional data may be available for depths not shown on this chart. For complete dataset, please use
data download function.
= Temperatures > 23 °C are lethal to salmonids.
= Temperatures between 18 °C to 23 °C may be too warm for salmonid survival.
Note: Dissolved oxygen thresholds for salmonid survival are indicated by color changes.
= Concentrations < 2 mg/L are lethal to salmonids.
= Concentrations < 4.25 mg/L may threaten salmonid survival.
Note: State water quality standards for pH thresholds are indicated by
color changes.
6.5 = the lower threshold, and 8.5 = the upper threshold of the Washington Aquatic Life Criteria.
