Data / Site & infrastructure / Ground
Soils: septic absorption fields
NRCS 'ENG - Septic Tank Absorption Fields', dominant condition.
About this data
- Published by
- USDA NRCS
SSURGO via Soil Data Access (map units from gNATSGO 2020) - Method
- Downloaded from SSURGO via Soil Data Access (map units from gNATSGO 2020).
- Update frequency
- Annual (October)
- Last updated
- Oct 6, 2026
- Records
- 537,000
- Coverage
- NRCS 'ENG - Septic Tank Absorption Fields', dominant condition.
Records in 56 of 56 counties. - License
- Public domain
Known gaps
Each hexagon (~0.7 km², ~900 m across) shows the rating that covers most of its area. A lot can sit on a different soil, so the site card asks Soil Data Access for the exact point. Map-unit outlines come from the July 2020 gNATSGO raster; ratings are current. Where only the coarse STATSGO survey exists (some national forest and park land), the popup says so. A septic permit still needs a site evaluation by the county sanitarian.
Preview
The newest or first 500 records. Click a column heading to sort. Use the filter to find a place or a name.
Fields
| Field | Column | Description |
|---|---|---|
| Cell | cell | |
| Sl | sl | |
| S15 | s15 | |
| S25 | s25 | |
| Dwellings w/o basements | dwb | |
| Sep | sep | |
| Frm | frm | |
| Drainage | drn | |
| Survey | sg | |
| Rps | rps | |
| Rpc | rpc | |
| Bp | bp |
Downloads and links
Data 4 MT is an index of public records. It republishes only what Montana and federal agencies make public, with a link to the source on each record. People are shown as “Private individual” on public pages and downloads; companies, trusts held by institutions, and governments keep their names. No document images, sale prices, voter, MVD or wildlife-telemetry data are stored. Verify any record against the publisher’s copy before relying on it.