5. Performance summary
Operational data from the LWDB for BOD5,
TSS, NH4-N, and TN are summarized in Table 1.
These statistics are global average values and do
not necessarily reflect the performance capability
of any single system. Carefully designed and operated
treatment wetlands would be expected to
exceed these performance expectations, while systems
with less than optimal plant communities,
flow distribution, or water depth control might
perform at lower levels.