Situations where infiltration is prohibited or not recommended
Summary of situations where infiltration of stormwater runoff is prohibited or not recommended.
Link to this table
| Condition | Prohibited | Not recommended | Not recommended unless conditions are met1 |
|---|---|---|---|
| Local rule or ordinance prohibits infiltration | X | ||
| BMP is < 100 feet from drinking well in sensitive aquifer | X | ||
| BMP is < 50 feet from drinking well in a non-sensitive aquifer | X | ||
| BMP receives discharges from vehicle fueling and maintenance areas | if CGP applies2 | X | |
| There is less than 3 of separation to bedrock or saturated soil | if CGP applies | X | |
| BMP receives discharges from certain industrial facilities | if CGP applies | ||
| BMP receives discharges from areas of contaminated soil | if CGP applies | X | |
| BMP is located in D soils, unless infiltration allowed by LGU | if CGP applies | X | |
| BMP is 1,000 feet up-gradient or 100 feet down-gradient of active karst, unless infiltration allowed by LGU | if CGP applies | X | |
| BMP is located within a DWSMA, unless infiltration allowed by LGU | if CGP applies | ||
| BMP is located within 1 year travel time of drinking supply well | X | ||
| BMP is located in soils with infiltration rate > 8.3 in/hr | if CGP applies | X | |
| BMP located within 10 feet of building or structure | X | ||
| BMP located within 35 feet of a septic system | X | ||
| BMP located less than 200 feet from toe of slope that exceeds 20% | X | ||
| BMP receives discharges from a confirmed stormwater hotspot | X | ||
| A mound beneath the BMP extends into the BMP | X |
see discussion below for conditions under which infiltration is acceptable.
2CGP = Construction Stormwater General Permit