Mifflin County septic services.

Mifflin County's subdivision ordinance applies in six of the county's 16 municipalities — Bratton and Wayne townships and Juniata Terrace, Kistler, McVeytown and Newton Hamilton boroughs — while the other ten have adopted their own. It carries a table of minimum lot standards for residential subdivisions and a separate water-supply and sewage-facilities section. DEP's service tabulation lists all 16 municipalities as running their own Act 537 sewage programme.

Mifflin County has no Exceptional Value waters, but 16 entries on DEP's Chapter 93 drainage lists are High Quality — including Unnamed Tributaries to Juniata River, Furnace Run, Beaverdam Run. A lot draining to one loses the § 71.51(b) planning exemption, so the sewage module goes to the municipality and then to DEP. That is a second reviewer, not a different septic system. Check your own stream before assuming the ordinary path.

The dominant constraint here is slow-percolating subsoil below 12 inches (51.4% of rated soils), followed by bedrock within 60 inches of the surface (48.7%). NRCS rates 89.9% of rated ground very limited for a conventional in-ground trench, 75.5% for a sand mound and 52.1% for drip irrigation -- where conventional is out, drip is often the system that works.