Septic system requirements in Matanuska-susitna, Alaska

The septic rules landplan.io applies in Matanuska-susitna, what a septic tank costs there, and the parcel data we hold.

Updated 6 October 2026

Design a septic system for an address in Matanuska-susitna

Alaska's state rules apply in Matanuska-susitna: landplan.io has no county rules of its own here. State rules: Reviewed See Alaska's rules

6system types permitted

1,000 gallonssmallest septic tank

Coveredparcel data

Septic systems allowed in Matanuska-susitna

The system types landplan.io permits in Matanuska-susitna:

Mound System
Cut and Fill system
Deep trench system
Leach pit system
Leach field
Surface Discharge

Septic tank size in Matanuska-susitna

The daily design flow of a home: 150 gal/day per bedroom, at least 240 gal/day. The septic tank is sized from that flow:

Septic Tank: minimum size by daily design flow
Daily design flow	Minimum tank
up to 240 gal/day	1,000 gallons
240 to 360 gal/day	1,500 gallons
360 to 600 gal/day	2,000 gallons
600 to 720 gal/day	2,500 gallons
720 to 840 gal/day	2,750 gallons
840 to 920 gal/day	3,000 gallons
920 to 1,040 gal/day	3,250 gallons

Septic setbacks in Matanuska-susitna

Minimum distances
From	To	Distance
Polygon	Existing Septic Component to be Abandoned	5 ft

These are the values the landplan.io design engine applies in Matanuska-susitna. Confirm a design with the Alaska health department or your county's before you build.

Parcel data in Matanuska-susitna

landplan.io has parcel boundaries for Matanuska-susitna (99.6% of its area): type an address and the design starts from the parcel.

Septic companies, designers and jobs in Alaska

Where the rules come from

The regulations and documents landplan.io's Matanuska-susitna, Alaska rules are read from:

18 AAC 72 - Wastewater Disposal (full chapter: general provisions, individual/on-site water and wastewater systems, conventional and alternative onsite wastewater systems, and definitions) (18 Alaska Administrative Code (AAC) 72.005 through 72.990 (all articles))

Near Matanuska-susitna

Questions

What septic systems are allowed in Matanuska-susitna?

landplan.io designs by Alaska's state rules there and permits: Mound System, Cut and Fill system, Deep trench system, Leach pit system, Leach field and Surface Discharge.

What size septic tank do I need in Matanuska-susitna?

landplan.io sizes the septic tank in Matanuska-susitna from the daily design flow: up to 240 gal/day: 1,000 gallons; 240 to 360 gal/day: 1,500 gallons; 360 to 600 gal/day: 2,000 gallons; larger flows need larger tanks. A home's design flow is 150 gal/day per bedroom, at least 240 gal/day.

Does landplan.io have parcel data for Matanuska-susitna, Alaska?

Yes: parcel boundaries cover Matanuska-susitna (99.6% of its area).