diff --git a/assets/src/scripts/monitoring-location/components/hydrograph/time-series-lines.js b/assets/src/scripts/monitoring-location/components/hydrograph/time-series-lines.js
index f9c6d3028eb9d326303e2c10b9a66fd4d85d781b..2f4986c09233737fb5125ef8d77368f14fbcc95b 100644
--- a/assets/src/scripts/monitoring-location/components/hydrograph/time-series-lines.js
+++ b/assets/src/scripts/monitoring-location/components/hydrograph/time-series-lines.js
@@ -1,9 +1,6 @@
 import {line as d3Line} from 'd3-shape';
+import {HASH_ID} from './selectors/iv-data';
 
-export const HASH_ID = {
-    primary: 'hash-45',
-    compare: 'hash-135'
-};
 
 const CIRCLE_RADIUS_SINGLE_PT = 1;