U.S. Geological Survey
Water-Resources Investigations Report 02-4228
Prepared as part of the
NATIONAL WATER-QUALITY ASSESSMENT PROGRAM

Quality of Shallow Ground Water in Areas of Recent Residential and Commercial Development, Wichita, Kansas, 2000

Table 9. Statistical summary and U.S. Environmental Protection Agency (2000a) drinking-water standards for
pesticide compounds detected in water from 30 monitoring wells in areas of recent residential
and commercial development, Wichita, Kansas, 2000

[MCL, Maximum Contaminant Level; HAL, lifetime Health Advisory Level; <, less than;
--, not applicable; E, estimated]

Pesticide compound Number of
samples 		Number of
detections 		Concentration
(micrograms per liter)
 Minimum  Median  Maximum		 Drinking-water
standard
(micrograms per
liter)
Atrazine 30 19 <0.001 0.006 0.14 3.0 (MCL)
Deethylatrazine 30 19   <.002 E.006 E.08 --
Dieldrin 30   1   <.001 <.001   .01 --
Metolachlor 30   3   <.002 <.002     .008 100 (HAL)
Pendimethalin 30   1   <.004 <.004     .006 --
Prometon 30   1   <.018 <.018   .06 100 (HAL)
Simazine 30   9   <.005 <.005   .07 4.0 (MCL)
Tebuthiuron 30   1 <.01 <.01     .05 500 (HAL)

NOTE: To return to report, use your browers back button.