Tag Archives: Biological Indicators

Reports Detail Stream Health and Remediation Strategies

On July 10, the U.S. Geological Survey released a report — Ecological Health in the Nation’s Streams, 1995-–2003. Chemical and physical properties can provide a picture of stream health, but biological indicators can provide a more comprehensive perspective. Species’ health can represent the cumulative effects of physical and chemical changes to an environment, and they […]

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WERF Releases New Tools and Reports

Flood grouting reduces wet weather sanitary sewer overflows According to a Water Environment Research Foundation (WERF) report released in February, flood grouting is a cost-effective solution that can reduce infiltration into sanitary sewers. In Seattle’s Broadview neighborhood, stormwater and groundwater were infiltrating defects in the sanitary sewer that had accumulated over time, causing wet weather […]

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Hinkson Creek in Missouri Shows Signs of Improvement

Hinkson Creek was the site of an earlier dispute between the U.S. Environmental Protection Agency (EPA) and local Missouri government and academic groups over a total maximum daily load (TMDL) requiring stormwater flow reductions. This summer, EPA dropped the flow-based surrogate from the TMDL. Now, preliminary data are showing that stormwater management actions taken by […]

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ACWA Releases Survey on the Use of Biological Indicators To Assess Nutrient Pollution

According to the U.S. Environmental Protection Agency (EPA), half of U.S. rivers, lakes, and streams and 60% of bays and estuaries are impaired by nutrients from urban and agricultural runoff and other sources. The Association of Clean Water Administrators (ACWA) recently released a survey on the use of biological indicators in state water programs. The […]

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California Regional Water Board Enforces Biological Performance as Water Quality Indicator

The San Diego Regional Water Quality Control Board is testing the use of biological performance as an enforceable standard in the San Marcos Creek District permits. The California State Water Resources Control Board and U.S. Environmental Protection Agency are using this as a pilot and working toward a statewide expansion of the standard by 2014. […]

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