Station list     Available data
ILLINOIS RIVER BASIN


414158088095600                         SPRING BROOK WASTEWATER TREATMENT FACILITY NEAR NAPERVILLE, IL



LOCATION.--Latitude 41°41'58", longitude 88°09'56", in SW1/4NW1/4SW1/4 sec.12, T. 37 N., R.09 E., Will County.

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

GAGE.--An 8-in.-diameter, heated, 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.

MAXIMUM FOR PERIOD OF RECORD.--Maximum, 4.37 in., August 4, 1998 but may have been greater during periods of missing record.

MAXIMUM FOR CURRENT YEAR.--Maximum, 2.74 in., October 17, 1998.
RAINFALL, IN INCHES, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 0.00 0.01 0.00 0.00 0.00 0.04 0.00 0.00 1.54 e0.64 0.00 0.00
2 e.65 .00 .00 s.04 .11 .11 .00 .00 .00 .00 .00 .00
3 .01 .00 .00 s.10 .02 .00 .01 .00 .00 .00 .00 .00
4 .00 .01 .00 .00 .00 .00 .09 .03 .00 .00 .00 .00
5 .35 .00 .00 .00 .01 s.55 .02 .03 .00 .00 .00 .00
6 e.25 .00 1.20 .00 .00 s.24 .02 .46 .26 .00 .00 .00
7 .00 .00 .00 .00 .00 s.01 .00 .01 .00 .00 .20 .00
8 .00 .04 .00 s.05 .00 .00 1.13 .00 .00 .00 .00 .00
9 .00 .48 .00 .00 .00 s.41 .09 .00 .00 e.06 .05 .00
10 .00 .59 .00 .00 .00 .00 .07 .00 .29 .00 .00 .00
11 .00 .00 .00 s.03 .33 .00 .02 1.72 e1.01 .00 .00 .00
12 .00 .00 .00 s.03 .00 .00 .00 .26 e.12 .00 .49 .23
13 .00 .00 .00 .00 .00 .00 .00 .40 e1.16 .00 .00 .00
14 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00
15 .06 .00 .00 .00 .00 .00 e1.09 .00 .00 .00 .00 .00
16 .00 .00 .00 s.08 .05 .00 e.53 .00 .00 .00 .00 .00
17 2.74 .00 .00 .40 .00 s.02 .00 .28 .00 .34 .00 .00
18 .17 .00 .00 .00 .00 .00 e.02 .05 .00 .00 .10 .00
19 .00 .00 .00 .03 .00 .00 .00 .00 .00 .32 .40 .26
20 .00 .00 .00 .00 .00 .00 .06 .00 .00 .81 .00 .00
21 .00 .00 s.01 .77 .00 .00 .00 e1.05 .00 .03 .00 .00
22 .00 .00 .00 .39 .00 .00 .89 .00 .30 .20 .00 .00
23 .00 .00 .00 .94 .00 .00 .19 .27 .66 .00 .35 .00
24 .00 .00 .00 .00 s.11 .00 .00 .00 .00 .00 1.53 .00
25 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .37 .00
26 .00 .00 .00 .00 .21 .00 .00 .00 .00 .00 .00 .00
27 .44 .00 .00 .00 .02 .00 1.82 .00 .02 .00 .00 .49
28 .00 .00 .00 .00 .04 s.02 .00 .03 .00 .00 .00 1.97
29 .33 .00 .00 .00 -- .00 .00 .00 .00 .00 .00 .15
30 .01 .34 s.01 .00 -- .00 .00 .00 .00 .00 .00 .00
31 .00 -- .00 .00 -- .00 -- .04 -- .00 .00 --

TOTAL 5.01 1.48 1.22 2.86 0.90 1.40 6.05 4.63 5.36 2.40 3.49 3.10
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data