diff --git a/src/main/java/gov/usgs/earthquake/nshmp/data/IntervalData.java b/src/main/java/gov/usgs/earthquake/nshmp/data/IntervalData.java
index 66c3c044d4e004f7c93114a31f41678357f3cddf..69a3d4662427d83c2a32a23cfac1707a6f72064f 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/data/IntervalData.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/data/IntervalData.java
@@ -42,13 +42,9 @@ public final class IntervalData {
     return keyArray(min, max, checkDelta(min, max, delta));
   }
 
-  /*
-   * Create clean sequence of keys. Precision is curently set to 4 decimal
-   * places.
-   */
+  /* Create clean sequence of keys. */
   private static double[] keyArray(double min, double max, double Δ) {
-    double Δby2 = Δ / 2.0;
-    return Sequences.arrayBuilder(min + Δby2, max - Δby2, Δ).build();
+    return Sequences.arrayBuilder(min, max, Δ).build();
   }
 
   /**