Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 925 - ILLINOIS WATER WELL PUMP INSTALLATION CODE
Section 925.50 - Disinfection and Samples
Current through Register Vol. 48, No. 12, March 22, 2024
a) General. When a pump or equipment installation is made on a well which has a use which results that the water meet bacterial quality standards for human consumption, the well, pump, piping and pressure tank shall be disinfected by the contractor. Sufficient chlorine shall be introduced to give a dosage of 100 parts per million to the water in the well.
b) Disinfection. Oil, grease, dirt, and other foreign matter shall be removed from the well and pump, piping and other equipment before installation and the introduction of chlorine. Quantities of household chlorine bleach or dry granules hypochlorite to produce a 100 part per million dosage are given in the following tables.
DIA. WELL IN INCHES |
GALLONS PER FT. |
AMOUNT OF DISINFECTANT REQUIRED FOR EACH 100 GALLONS OF WATER |
|
3 |
.37 |
LAUNDRY BLEACH (5.25 % Chlorine) |
HYPOCHLORITE GRANULES (70% Chlorine) |
4 |
.65 |
||
5 |
1.0 |
||
6 |
1.5 |
||
8 |
2.6 |
3 cups |
2 ounces |
10 |
4.1 |
||
12 |
6.0 |
||
1 cup = 8 oz. measuring cup |
|||
(2 cups = 1 pt. |
|||
4 cups = 1 qt.) |
|||
1 oz. = 1 heaping tablespoon granules |
|||
16 oz. = 1 pound |
DIAMETER OF WELL (IN FEET) |
3 |
4 |
5 |
6 |
7 |
8 |
10 |
AMOUNT OF 5.25% LAUNDRY BLEACH TO USE PER FOOT OF WATER (IN CUPS) |
11/2 |
3 |
41/2 |
6 |
9 |
12 |
12 |
AMOUNT OF 70% CHLORINE GRANULES OR POWDER TO USE PER FOOT OF WATER (IN OUNCES) |
1 |
2 |
3 |
4 |
6 |
8 |
12 |
c) Water Sample Analysis. Upon installation of a well pump or repair or modification of any well pump or equipment the contractor shall give the owner information prepared by the Department explaining the importance of water well sampling, procedures for sampling and how the water can be tested to assure a safe supply of water.