Delta County, CO's soil, for a septic absorption field

Very limited

In Delta County, CO, 90.5% of the surveyed land carries a "Very limited" rating for a standard septic drain field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 90.5% of Delta County's land. Delta County, CO is 1,142.126 square miles with a population of 32,215.

What Delta County's reading doesn't cover

USDA's survey covers the whole of Delta County, CO at once, not any single address. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Delta County will actually do.

What a system would cost here

With 90.5% of Delta County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

How Delta County, CO compares

Nationally, Delta County, CO is the 1,212-most-constrained of 3,058 rated counties for septic soil. Within Colorado alone it ranks 12 of 63.

Further reading

How this rating is built, and its real limits · Conventional vs. engineered septic systems