Septic system rules and costs by state
The septic rules landplan.io designs by in each state and county, with delivered septic tank prices and the parcel data we hold. Pick a state.
Updated
50states with their own septic rules in landplan.io
1counties with rules of their own
2,820US counties with parcel data
95.9%of Americans live in a county we have parcels for
Septic rules, sizes and costs by state
| State | Rules in landplan.io | Counties with own rules | Aeration Tank median | Parcel coverage |
|---|---|---|---|---|
| Alabama | Reviewed | — | — | 67 of 67 counties (100% of people) |
| Alaska | Reviewed | — | — | 4 of 30 counties (37.3% of people) |
| Arizona | Reviewed | — | — | 8 of 15 counties (34% of people) |
| Arkansas | Reviewed | — | — | 75 of 75 counties (100% of people) |
| California | Reviewed | 1 | — | 57 of 58 counties (100% of people) |
| Colorado | Reviewed | — | — | 50 of 64 counties (97.8% of people) |
| Connecticut | Reviewed | — | — | 9 of 9 counties (100% of people) |
| Delaware | Reviewed | — | — | 3 of 3 counties (100% of people) |
| District of Columbia | Default rules only | — | — | 1 of 1 counties (100% of people) |
| Florida | Reviewed | — | — | 67 of 67 counties (100% of people) |
| Georgia | Reviewed | — | — | 119 of 159 counties (92.8% of people) |
| Hawaii | Reviewed | — | — | 5 of 5 counties (100% of people) |
| Idaho | Reviewed | — | — | 40 of 44 counties (97.6% of people) |
| Illinois | Reviewed | — | — | 78 of 102 counties (94.9% of people) |
| Indiana | Reviewed | — | — | 92 of 92 counties (100% of people) |
| Iowa | Reviewed | — | — | 71 of 99 counties (89% of people) |
| Kansas | Reviewed | — | — | 60 of 105 counties (90.5% of people) |
| Kentucky | Reviewed | — | — | 41 of 120 counties (68.3% of people) |
| Louisiana | Reviewed | — | — | 44 of 64 counties (79.3% of people) |
| Maine | Reviewed | — | — | 16 of 16 counties (100% of people) |
| Maryland | Reviewed | — | — | 24 of 24 counties (100% of people) |
| Massachusetts | Reviewed | — | — | 14 of 14 counties (100% of people) |
| Michigan | Reviewed | — | — | 61 of 83 counties (88.6% of people) |
| Minnesota | Reviewed | — | — | 84 of 87 counties (99.5% of people) |
| Mississippi | Reviewed | — | — | 82 of 82 counties (100% of people) |
| Missouri | Reviewed | — | — | 81 of 115 counties (92.6% of people) |
| Montana | Reviewed | — | — | 56 of 56 counties (100% of people) |
| Nebraska | Reviewed | — | — | 93 of 93 counties (100% of people) |
| Nevada | Reviewed | — | — | 17 of 17 counties (100% of people) |
| New Hampshire | Reviewed | — | — | 10 of 10 counties (100% of people) |
| New Jersey | Reviewed | — | — | 21 of 21 counties (100% of people) |
| New Mexico | Reviewed | — | — | 26 of 33 counties (93% of people) |
| New York | Reviewed | — | — | 62 of 62 counties (100% of people) |
| North Carolina | Reviewed | — | — | 100 of 100 counties (100% of people) |
| North Dakota | Reviewed | — | — | 53 of 53 counties (100% of people) |
| Ohio | Reviewed | — | $7,235 | 88 of 88 counties (100% of people) |
| Oklahoma | Reviewed | — | — | 56 of 77 counties (89.9% of people) |
| Oregon | Reviewed | — | — | 36 of 36 counties (100% of people) |
| Pennsylvania | Reviewed | — | — | 66 of 67 counties (99.8% of people) |
| Rhode Island | Reviewed | — | — | 5 of 5 counties (100% of people) |
| South Carolina | Reviewed | — | — | 45 of 46 counties (99.6% of people) |
| South Dakota | Reviewed | — | — | 56 of 66 counties (80% of people) |
| Tennessee | Reviewed | — | — | 94 of 95 counties (93% of people) |
| Texas | Reviewed | — | — | 253 of 254 counties (100% of people) |
| Utah | Reviewed | — | — | 15 of 29 counties (82.4% of people) |
| Vermont | Reviewed | — | — | 14 of 14 counties (100% of people) |
| Virginia | Reviewed | — | — | 133 of 133 counties (100% of people) |
| Washington | Reviewed | — | — | 37 of 39 counties (97% of people) |
| West Virginia | Reviewed | — | — | 55 of 55 counties (100% of people) |
| Wisconsin | Reviewed | — | — | 72 of 72 counties (100% of people) |
| Wyoming | Reviewed | — | — | 19 of 23 counties (85.9% of people) |
Rules are what the landplan.io design engine applies in each state: the system types it permits, how it sizes the septic tank from the daily design flow, setbacks and soil loading rates. Verified rules were checked against the regulations by a licensed designer, reviewed ones by our staff. Always confirm a design with the local health department.
Data behind these pages
landplan.io data coverage: the products, prices, parcels and rules we hold, updated live.