Primary Activity Category

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

This web site provides query access to over 200 million monitoring records originally reported to EPA via the Legacy STORET System.

Code	Name
C	Effluent Permit Condition
V	Effluent (Sample)
L	Biological
J	Tissue
S	Spatial Composite
T	Temporal Composite
B	Both Spatial and Temporal Composite
F	Flow Proportional
G	Grab Sample
D	Replicate