Composite Statistic

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	Performance Type Ind	Print Format
A	Average	N	AVE
H	Maximum	N	MAX
L	Minimum	N	MIN
N	Number of Observations for the Sample	N	NUM
S	Standard Deviation	N	SD
U	Sum of Squares	N	SS
V	Variance	N	VAR
C	Coefficient of Error	N	COF
X	Coefficient of Variance	N	COV
E	Skewness	Y	SKW
F	Kurtosis	Y	KUR
Z	Number of Samples in Composite Exceeds Established Limit	N	EXC
%	Precision	Y	PRE
$	Accuracy	Y	ACC
B	None of the Above	N
D	Indicates Replicate Sample	N	REP