Water Quality MonitoringNEWS Use of monitoring biological data by citizen
monitoring groups! On March 26, 2002, the U.S. EPA issued a one-page memo
-- "Clarification of the Use of Biological Data and Information in
the 2002 Integrated Water Quality Monitoring and Assessment Report Guidance."
Find the PDF version at: http://www.epa.gov/owow/tmdl/guidance/biochange20302.pdf This memorandum modifies the 2002 Integrated Water
Quality Monitoring and Assessment Report Guidance to provide clarity and
promote consistency in the manner in which states use biological data and information
in developing their 2002 submissions. Specifically, EPA has removed the
following paragraph from the Guidance... "If a state or territory determines that
an AU does not meet a use based on biological information and the cause
of the impairment is unknown, the AU may be listed in Category 3. If a
state or territory lists the AU in Category 3, EPA strongly recommends
that the state or territory schedule additional monitoring to expeditiously
determine the cause of the impairment." EPA believed that this paragraph
could have been interpreted to be inconsistent with the intent of the
Clean Water Act (CWA) because it could have led to the placement of a formally defined impaired
water into Category 3. When
existing and readily available data and information (biological,chemical
or physical) are sufficient to determine that a pollutant has caused,
is suspected of causing, or is projected to cause the impairment, the
AU should be listed in Category 5. (When biological data and information
indicates that the impairment is not caused by a pollutant, the AU may
be placed in Category 4C.) Only when the state determines that the existing
data and information (biological, chemical or physical) are insufficient
to support an attainment determination, can an AU be listed in Category
3. |
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