Each site is a section of the Watermark platform — pivoted by basinstate. Live & building sites open; queued and tracking
sites route to their coming-soon / watch page.
LiveBuildingQueuedTracking Locked
Switch site 35 sites · 10 basins2 states35 openGroup by
Each site is one Watermark investigation. The page color says what opens; the campus line is the build on the ground — two different clocks.
Extension narrative · #233 · the corridor it joins
The river is already effluent — drag the season
At the drought flow Ohio writes discharge permits at, the Ottawa leaving Lima is
93% treated effluent — 12.69 cfs of WWTP +
campus discharge against 1.01 cfs of natural low flow. Drag the river
lower and the dilution collapses to nothing at the 1Q10 = 0 dry
floor. The campus joins this reach twice; three large RSEI dischargers already sit
on it. The screen below is modeled, not measured — it shows who and how
much, never that the river's capacity is exceeded. That record is
[open]. Full essay:
toxics and the corridor →
Bullet · measure vs limitAt the design low flow, the Ottawa is effluent
scale · cubic feet per second
Natural low flow · 7Q10
[verified]
1.01 cfs
Treated effluent · WWTP + campus
[verified]
12.69 cfs
The red mark is the river's entire natural low flow. Treated effluent runs about 13× larger — 93% of the design-low-flow Ottawa is effluent.