Okla. Admin. Code § 252:631-3-20
All PWS systems must maintain a water pressure of at least twenty-five (25) psi throughout the distribution system.
Added at 17 Ok Reg 1987, eff 6-12-00
Amended at 20 Ok Reg 1153, eff 6-1-03
Amended at 25 Ok Reg 2305, eff 7-11-08