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Streams water quality data

Map of King County stream monitoring sites providing access to water quality and land use data. Explore trends over time, compare findings to water quality standards and download data for further analysis.

Download data

Select a water quality monitoring site and download data for selected time span including temperature, dissolved oxygen, pH, conductivity, nitrogen, phosphorus, E. coli, fecal coliform, alkalinity, total suspended solids and turbidity.

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