Title 124 Chapter 10

Title 124 - NEBRASKA DEPARTMENT OF ENVIRONMENTAL QUALITY
Chapter 10 - SEPTIC TANK CAPACITY

001 "Dwellings" - The liquid capacity of a septic tank serving a dwelling shall be based on the number of bedrooms served. For three or less bedrooms, an adequate septic tank capacity shall be one thousand gallons. For each additional bedroom two hundred fifty gallons shall be added. Table 10.1 may be used to determine capacities.

001.01

For ten or more bedrooms the septic tank shall be sized under the category of "Establishments."

001.02

For multiple dwellings connected to a single tank, one additional bedroom capacity must be added for each dwelling connected. Table 10.2 may be used for sizing.

002 "Establishments" - The liquid capacity of a septic tank serving an establishment other than a dwelling shall be at least equal to 1125 gallons plus 0.75 times the design flow in gallons per day (gpd) for flows over 1500 gpd. For flows less than 1500 gpd, 1.5 times the design flow may be used but a minimum of a 1000 gallon tank is required.

003 For design flows greater than 2000 gpd, the installation of a two-compartment septic tank or two septic tanks installed in series is required.

004 The tank capacity required for septic systems serving high strength, high temperature or inhibitors in wastewater such as camper dump stations, laundry mats, and butcher shops or other similar facilities shall be doubled.

Number Of Bedrooms-One Dwelling	Design Flow in Gallons per Day	Septic Tank Size In Gallons	Dwelling With Whirlpool Bath, Septic Tank Size In Gallons
1	200	1000	1000
2	300	1000	1000
3	400	1000	1250
4	500	1250	1500
5	600	1500	1750
6	700	1750	2000
7	800	2000	2250
8	900	2250	2500
9	1000	2500	2750
10	1100	Establishment	Establishment

Total Bedrooms	Single Family Dwelling	Two-Units	Three-Units	Four-Units	Five-Units
1	1	-	-	-	-
2	2	3	-	-	-
3	3	4	5	-	-
4	4	5	6	7	-
5	5	6	7	8	9
6	6	7	8	9	Establishment
7	7	8	9	Establishment	Establishment
8	8	Establishment	Establishment	Establishment	Establishment
9	9	Establishment	Establishment	Establishment	Establishment

005 For the purpose of this chapter, "capacity" shall be the volume as measured by the dimensions below the bottom of the outlet.

Enabling Legislation: Neb. Rev. Stat. §81-1505(8).

Legal Citation: Title 124, Ch. 10, Nebraska Department of Environmental Quality

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