15 Miss. Code. R. 18-77-1.5.6

Current through December 10, 2024

Rule 15-18-77-1.5.6 - IOWDS Classifications

All residential IOWDS must comply with one (1) of the following:

1. Design-based. An IOWDS that meets the following:

a. Treatment

i. Septic Tank

ii. Advanced Treatment System

b. Disposal

i. Aggregate

ii. Aggregate Replacement

iii. Elevated Sand Mound

iv. Drip Irrigation

v. Spray Irrigation (disinfected)

vi. Overland Discharge (disinfected)

vii. Non-water borne

2. Engineer-based. An IOWDS that meets the following:

a. Design-based

b. Performance-based

3. Performance-based. An IOWDS that is certified by a Licensed Professional Engineer to meet the following minimum effluent standards:

a. BOD₅ - 10 mg/l

b. TSS - 10 mg/l

c. PO₄-P - 15 mg/l

d. NH₄-N - 10 mg/l

e. Fecal Coliform - 10,000 cfu/1000 ml

f. All IOWDS effluent must comply with either the minimum effluent standards unless background water quality is a higher number than these levels. In this case, the background level will become the standard of performance

g. Background water levels and IOWDS effluent must be sampled in accordance with Department guidelines. (To be forthcoming)

15 Miss. Code. R. 18-77-1.5.6

Miss Code Ann § 41-67-3