Station list     Available data
ILLINOIS RIVER BASIN


414655088102300       NAPERVILLE NORTH OPERATIONS CENTER AT NAPERVILLE, IL



LOCATION.-- Latitude 41°46'55", Longitude 88°10'23", in NE1/4NW1/4NE1/4 sec.14, T.38 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on State Highway 34 2.0 mi east of State Highway 59, and located at the Naperville North Operations Center at Naperville.

PERIOD OF RECORD.--
PRECIPITATION: July 1997 to current year.

GAGE.-- A 6-in.-diameter, unheated, tipping-bucket rain gage.

REMARKS.-- Snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors.

EXTREMES FOR PERIOD OF RECORD.--
PRECIPITATION: Maximum daily total, 2.71 in., August 4, 1998.

EXTREMES FOR CURRENT YEAR.-- Maximum daily total, 1.72 in. (estimated), November 9.

PRECIPITATION, TOTAL, INCHES, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
DAILY SUM VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00
2 .00 .15 .00 .00 .00 .00 .00 .00 .00 .00 .09 .00
3 .80 .00 .00 .00 .00 .00 .00 .00 .00 .24 .00 .02
4 .24 .00 .00 .00 s.02 .00 .00 .00 .00 .00 .00 .00
5 .09 .00 .00 s.12 .00 .00 .38 .00 .79 .00 .00 .00
6 .00 1.37 .00 .00 s.04 .00 .38 .14 .01 .00 .00 .82
7 .02 .00 s.01 .00 s.01 .00 .01 .14 .00 .13 .00 .00
8 .00 .12 .00 .00 .51 .00 .00 .00 .00 .00 .00 .00
9 .00 e1.72 .00 .00 .41 .00 .14 .00 .00 .00 .14 .31
10 .00 .00 .03 .00 .00 .05 .00 .27 .00 .00 .00 .00
11 .00 .00 .00 .00 s.01 .03 .25 .22 .04 .00 .00 .00
12 .00 .02 .00 .00 .00 .20 .01 .00 .35 .00 .00 .00
13 .00 .21 .00 .00 .03 .00 .00 .00 .00 .00 .09 .00
14 .01 .00 s.05 .17 .21 .02 .00 .02 .03 .00 .00 .00
15 .01 .00 .00 .05 .00 .33 .61 .00 .02 .00 .10 .00
16 .00 .00 .26 .00 .00 .08 .00 .00 .00 .00 .62 .00
17 .00 .00 .00 .00 .00 .16 .01 .06 .00 .00 .00 .01
18 .00 .00 .00 .00 .00 .00 .00 .09 .10 .02 .29 .72
19 .00 .00 .00 .00 .00 .00 .02 .00 .00 .00 .01 1.16
20 .00 .00 .00 .00 .00 .00 .29 .01 .00 .00 .00 .42
21 .00 .00 .00 .00 .00 .00 .59 .43 .21 .52 .00 .04
22 .00 .00 .00 .00 .00 .00 .16 .13 .00 .16 .19 .00
23 .13 .00 .00 .00 s.01 .00 .56 .05 .00 .15 .00 .86
24 .01 .00 .00 .00 1.10 .00 .00 .02 .00 .31 .10 .00
25 .00 .23 .00 .00 .00 .00 .00 .37 .00 .53 1.04 .00
26 .00 .11 .00 .00 .00 .00 .00 .68 .00 .00 .00 .00
27 .00 .00 .00 s.03 .00 .00 .00 .04 .00 .00 .00 .00
28 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00
29 .00 .05 .00 .72 -- .00 .00 .00 .00 .00 .00 .00
30 .00 .00 .00 .18 -- .00 .00 .00 .00 .00 .52 .00
31 .00 -- .00 .00 -- .06 -- .65 -- .00 .13 --

TOTAL 1.31 3.99 0.37 1.27 2.35 0.93 3.41 3.32 1.70 2.06 3.32 4.36

s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data