diff --git a/DQM/python/dqm.py b/DQM/python/dqm.py
index 0ea884e4c..85e9e57c5 100644
--- a/DQM/python/dqm.py
+++ b/DQM/python/dqm.py
@@ -237,6 +237,15 @@ def __init__(self,name="EcalDigiVerify") :
         self.ecalRecHitColl = "EcalRecHits"
         self.ecalRecHitPass = "" #use whatever pass is available
 
+        self.build1DHistogram( "rec_sim_hit_residual_x" ,
+                "RecHit X - SimHit X [mm]" , 30 , -15.0 , 15.0 )
+        
+        self.build1DHistogram( "rec_sim_hit_residual_y" ,
+                "RecHit Y - SimHit Y [mm]" , 30 , -15.0 , 15.0 )
+
+        self.build1DHistogram( "rec_sim_hit_residual_z" ,
+                "RecHit Z - SimHit Z [mm]" , 40 , -20.0 , 20.0 )
+
         self.build1DHistogram( "num_sim_hits_per_cell" ,
                 "Number of SimHits per ECal Cell (excluding empty rec cells)" , 20 , -0.5 , 19.5 )
         
diff --git a/DQM/src/DQM/EcalDigiVerifier.cxx b/DQM/src/DQM/EcalDigiVerifier.cxx
index 3d1b83344..4126fdd00 100644
--- a/DQM/src/DQM/EcalDigiVerifier.cxx
+++ b/DQM/src/DQM/EcalDigiVerifier.cxx
@@ -57,6 +57,12 @@ void EcalDigiVerifier::analyze(const framework::Event &event) {
       if (rawID == simHit.getID()) {
         numSimHits += simHit.getNumberOfContribs();
         totalSimEDep += simHit.getEdep();
+        auto residualX = recHit.getXPos() - simHit.getPosition()[0];
+        auto residualY = recHit.getYPos() - simHit.getPosition()[1];
+        auto residualZ = recHit.getZPos() - simHit.getPosition()[2];
+        histograms_.fill("rec_sim_hit_residual_x", residualX);
+        histograms_.fill("rec_sim_hit_residual_y", residualY);
+        histograms_.fill("rec_sim_hit_residual_z", residualZ);
       } else if (rawID < simHit.getID()) {
         // later sim hits - all done
         break;