diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index 2ba7e615..7081800e 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -756,16 +756,18 @@ exports.motorAction = async (req, reply) => {
 exports.consumption = async (req, reply) => {
   try {
     const customerId = req.params.customerId;
-    const tanks = await Tank.find({ customerId });
+    const tanks = await Tank.find({ customerId,tankLocation:"overhead"});
     const tankData = []; 
     for (const tank of tanks) {
       const tankId = tank._id;
-      let capacity = parseInt(tank.capacity.replace(/,/g, ''), 10);
-      let waterLevel = capacity*2+1700; // initial water level
+      const waterlevel_at_midnight = parseInt(tank.waterlevel_at_midnight.replace(/,/g, ''), 10);
+      const total_water_added_from_midnight = parseInt(tank.total_water_added_from_midnight.replace(/,/g, ''), 10);
+      const waterlevel = parseInt(tank.waterlevel.replace(/,/g, ''), 10);
+      
       const tankname = tank.tankName
-
+      const consumption = (waterlevel_at_midnight+total_water_added_from_midnight)-waterlevel
      
-        const newWaterLevel = Math.floor(waterLevel);
+        const newWaterLevel = Math.floor(consumption);
         tankData.push({ tankname, waterLevel: newWaterLevel });