De-listing considerations


In order to de-list a stream organizations must submit a monitoring plan.  These plans must be reviewed and approved by WVDEP to ensure quality data is collected and sampling locations are consistent with the original listing.  CLICK-HERE for guidance on writing your monitoring plan.

  1. It is important to know how/why the stream was listed. 
  2. Determine the original sampling location(s), especially if the stream is partially listed.  If there is only one sampling location on a stream, no matter where is is, the listing will be usually be the ENTIRE LENGTH.
  3. A stream cannot be delisted until there is sufficient water quality (WQ) data from the location(s) that caused the listing.  There are exceptions, such as the location is inaccessible. In those cases, the revised location must be as close as possible to the original, and have no other influences that could change the conditions.
  4. WVDEP applies the 10 percent rule for the listing WQ impairments.  To de-list, WVDEP requires sufficient samples to ensure the stream is no longer impaired. WVDEP’s WAB and TMDL Program recommends two monthly samples for one-year (24-samples). If two/month samples are not possible, the minimum sample set must be 20.

For questions, additional information and/or assistance contact Chris Daugherty.

Additional resources

WVDEP's Watershed Assessment Branch SOPs

Recommended steps for monitoring program design

Guide to writing a water quality monitoring plan