Ill. Admin. Code tit. 35, § 604.150 - Protection of Community Water Supply Structures

a) Each community water supply must protect its wells, clear water reservoirs, suction lines, gravity filters, iron removal, chlorine reaction and wet salt storage basins from sources of contamination by maintaining the following minimum distances:

Source of Contamination	Distance for Clay or Loam Soils	Distances for Soils with Higher Permeability than Clay or Loam
Cesspools, leaching sewage disposal pits	150'	300'
Privies	150'	300'
Septic tanks and subsurface septic tanks effluent disposal tile	75'	150'
Livestock, grazing areas or feedlots	50'	100'
Sewers (non-watertight)	50'	50'
Sewers (cast iron pipe, with leaded or mechanical joints)	25'	25'
Sewers (extra-heavy cast iron pipe, asbestos-cement pressure pipe, prestressed concrete pipe, or PVC (polyvinyl chloride) pipe meeting water main standards, with pressure tested, leaded, mechanical or slip-on joints	10'	10'
Washwater sumps of reinforced concrete construction	10'	10'
Flood waters - A horizontal distance must be maintained by natural earth or fill. In addition, wells must meet the requirements of Section 604.240(k).	15'*	15'*
Flood waters - A vertical distance must be maintained to which structure and earth protection must be carried above maximum high water elevation. In addition, wells must meet the requirements of Section 604.240(k).	2'	2'
Fuel storage tanks above ground	25'**	25'**
* The Agency must consider special structural arrangements equivalent to earthen construction for protection of the well when horizontal earth protection is impractical.
** unless otherwise approved by the Agency under Section 604.145(b)

b) Wells must meet the setback requirements of the Act.

c) Fuel storage tanks located at a community water supply facility must be above ground and must have secondary containment.

Notes

Ill. Admin. Code tit. 35, § 604.150

Adopted in R18-17 at 43 Ill. Reg. 8064, effective 7/26/2019.