diff --git a/rowers/interactiveplots.py b/rowers/interactiveplots.py
index 69ed2ff7..f8c217b0 100644
--- a/rowers/interactiveplots.py
+++ b/rowers/interactiveplots.py
@@ -6439,7 +6439,7 @@ def get_zones_report(rower, startdate, enddate, trainingzones='hr', date_agg='we
                ).strftime('%y/%m/%d')
 
         # print(w.date,arrow.get(w.date),arrow.get(w.date).isocalendar())
-
+        iswater = w.workouttype in mytypes.otwtypes
         qryw = 'workoutid == {workoutid}'.format(workoutid=w.id)
 
         qry = 'hr < {ut2}'.format(ut2=rower.ut2)
@@ -6464,6 +6464,9 @@ def get_zones_report(rower, startdate, enddate, trainingzones='hr', date_agg='we
         if trainingzones == 'power':
             qry = '{ut2} <= power < {ut1}'.format(
                 ut1=rower.pw_ut1, ut2=rower.pw_ut2)
+            if iswater:
+                qry = '{ut2} <= power < {ut1}'.format(
+                    ut1=rower.pw_ut1*rower.otwslack/100., ut2=rower.pw_ut2*rower.otwslack/100.)
         timeinzone = df.query(qry).query(qryw)['deltat'].sum()/(60*1e3)
         if date_agg == 'week':
             dates.append(dd4)
@@ -6483,6 +6486,9 @@ def get_zones_report(rower, startdate, enddate, trainingzones='hr', date_agg='we
         if trainingzones == 'power':
             qry = '{ut1} <= power < {at}'.format(
                 ut1=rower.pw_ut1, at=rower.pw_at)
+            if iswater:
+                qry = '{ut1} <= power < {at}'.format(
+                    ut1=rower.pw_ut1*rower.otwslack/100., at=rower.pw_at*rower.otwslack/100.)
         timeinzone = df.query(qry).query(qryw)['deltat'].sum()/(60*1e3)
         if date_agg == 'week':
             dates.append(dd4)
@@ -6501,6 +6507,9 @@ def get_zones_report(rower, startdate, enddate, trainingzones='hr', date_agg='we
         qry = '{at} <= hr < {tr}'.format(at=rower.at, tr=rower.tr)
         if trainingzones == 'power':
             qry = '{at} <= power < {tr}'.format(at=rower.pw_at, tr=rower.pw_tr)
+            if iswater:
+                qry = '{at} <= power < {tr}'.format(at=rower.pw_at*rower.otwslack/100.,
+                                                    tr=rower.pw_tr*rower.otwslack/100.)
         timeinzone = df.query(qry).query(qryw)['deltat'].sum()/(60*1e3)
         if date_agg == 'week':
             dates.append(dd4)
@@ -6519,6 +6528,9 @@ def get_zones_report(rower, startdate, enddate, trainingzones='hr', date_agg='we
         qry = '{tr} <= hr < {an}'.format(tr=rower.tr, an=rower.an)
         if trainingzones == 'power':
             qry = '{tr} <= power < {an}'.format(tr=rower.pw_tr, an=rower.pw_an)
+            if iswater:
+                qry = '{tr} <= power < {an}'.format(tr=rower.pw_tr*rower.otwslack/100.,
+                                                    an=rower.pw_an*rower.otwslack/100.)
         timeinzone = df.query(qry).query(qryw)['deltat'].sum()/(60*1e3)
         if date_agg == 'week':
             dates.append(dd4)
@@ -6537,6 +6549,8 @@ def get_zones_report(rower, startdate, enddate, trainingzones='hr', date_agg='we
         qry = 'hr >= {an}'.format(an=rower.an)
         if trainingzones == 'power':
             qry = 'power >= {an}'.format(an=rower.pw_an)
+            if iswater:
+                qry = 'power >= {an}'.format(an=rower.pw_an*rower.otwslack/100.)
         timeinzone = df.query(qry).query(qryw)['deltat'].sum()/(60*1e3)
         if date_agg == 'week':
             dates.append(dd4)