diff --git a/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java b/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java
index bec946cf500..ef0b384225c 100644
--- a/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java
+++ b/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java
@@ -245,7 +245,10 @@ public static GraphBuilder forDirectory(CommandLineParameters params, File dir)
             osmModule.staticBikeParkAndRide = builderParams.staticBikeParkAndRide;
             osmModule.staticParkAndRide = builderParams.staticParkAndRide;
             graphBuilder.addModule(osmModule);
-            graphBuilder.addModule(new PruneFloatingIslands());
+            PruneFloatingIslands pruneFloatingIslands = new PruneFloatingIslands();
+            pruneFloatingIslands.setPruningThresholdIslandWithoutStops(builderParams.pruningThresholdIslandWithoutStops);
+            pruneFloatingIslands.setPruningThresholdIslandWithStops(builderParams.pruningThresholdIslandWithStops);
+            graphBuilder.addModule(pruneFloatingIslands);
         }
         if ( hasGTFS ) {
             List<GtfsBundle> gtfsBundles = Lists.newArrayList();
diff --git a/src/main/java/org/opentripplanner/graph_builder/module/PruneFloatingIslands.java b/src/main/java/org/opentripplanner/graph_builder/module/PruneFloatingIslands.java
index 3d0cb6c0a09..0fa3042ffa6 100644
--- a/src/main/java/org/opentripplanner/graph_builder/module/PruneFloatingIslands.java
+++ b/src/main/java/org/opentripplanner/graph_builder/module/PruneFloatingIslands.java
@@ -38,13 +38,13 @@ public class PruneFloatingIslands implements GraphBuilderModule {
      * this field indicate the maximum size for island without stops
      * island under this size will be pruned.
      */
-    private int islandWithoutStopsMaxSize = 40;
+    private int pruningThresholdIslandWithoutStops;
 
     /**
      * this field indicate the maximum size for island with stops
      * island under this size will be pruned.
      */
-    private int islandWithStopsMaxSize = 5;
+    private int pruningThresholdIslandWithStops;
 
     /**
      * The name for output file for this process. The file will store information about the islands 
@@ -72,8 +72,8 @@ public List<String> getPrerequisites() {
     public void buildGraph(Graph graph, HashMap<Class<?>, Object> extra) {
         LOG.info("Pruning isolated islands in street network");
         
-        StreetUtils.pruneFloatingIslands(graph, islandWithoutStopsMaxSize, 
-                islandWithStopsMaxSize, islandLogFile);
+        StreetUtils.pruneFloatingIslands(graph, pruningThresholdIslandWithoutStops, 
+        		pruningThresholdIslandWithStops, islandLogFile);
         if (transitToStreetNetwork == null) {
             LOG.debug("TransitToStreetNetworkGraphBuilder was not provided to PruneFloatingIslands. Not attempting to reconnect stops.");
         } else {
@@ -87,5 +87,11 @@ public void buildGraph(Graph graph, HashMap<Class<?>, Object> extra) {
     public void checkInputs() {
         //no inputs
     }
+    public void setPruningThresholdIslandWithoutStops(int pruningThresholdIslandWithoutStops) {
+    	this.pruningThresholdIslandWithoutStops = pruningThresholdIslandWithoutStops;
+    }
+    public void setPruningThresholdIslandWithStops(int pruningThresholdIslandWithStops) {
+    	this.pruningThresholdIslandWithStops = pruningThresholdIslandWithStops;
+    }
 
 }
\ No newline at end of file
diff --git a/src/main/java/org/opentripplanner/standalone/GraphBuilderParameters.java b/src/main/java/org/opentripplanner/standalone/GraphBuilderParameters.java
index f598869ba2f..94c491f800b 100644
--- a/src/main/java/org/opentripplanner/standalone/GraphBuilderParameters.java
+++ b/src/main/java/org/opentripplanner/standalone/GraphBuilderParameters.java
@@ -116,6 +116,18 @@ public class GraphBuilderParameters {
      * Maximal distance between stops in meters that will connect consecutive trips that are made with same vehicle
      */
     public int maxInterlineDistance = 200;
+    
+    /**
+     * This field indicates the pruning threshold for islands without stops.
+     * Any such island under this size will be pruned.
+     */
+    public final int pruningThresholdIslandWithoutStops;
+    
+    /**
+     * This field indicates the pruning threshold for islands with stops.
+     * Any such island under this size will be pruned.
+     */
+    public final int pruningThresholdIslandWithStops;
 
     /**
      * Set all parameters from the given Jackson JSON tree, applying defaults.
@@ -144,6 +156,8 @@ public GraphBuilderParameters(JsonNode config) {
         staticBikeParkAndRide = config.path("staticBikeParkAndRide").asBoolean(false);
         maxHtmlAnnotationsPerFile = config.path("maxHtmlAnnotationsPerFile").asInt(1000);
         maxInterlineDistance = config.path("maxInterlineDistance").asInt(200);
+        pruningThresholdIslandWithoutStops = config.path("islandWithoutStopsMaxSize").asInt(40);
+        pruningThresholdIslandWithStops = config.path("islandWithStopsMaxSize").asInt(5);
     }
 
 }