diff --git a/src/index.ts b/src/index.ts
index b4644be..657f75d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -15,7 +15,8 @@ const RAIN_GAUGE_ENDPOINT = process.env.RAIN_GAUGE_ENDPOINT;
 const SOIL_SENSOR_ENDPOINT = process.env.SOIL_SENSOR_ENDPOINT;
 const TEASENSE_ENDPOINT = process.env.TEASENSE_ENDPOINT;
 const PORT = process.env.PORT || 3000;
-const RAIN_GAUGE_SLEEP = 100;
+const DATA_COLLECT_SLEEP = 100;
+const PURGE_SLEEP = 60000;
 
 mongoose.connect(process.env.DB_URL ?? '');
 
@@ -112,7 +113,17 @@ const collectData = async () => {
       console.log(e);
     }
   }
-  setTimeout(() => collectData(), RAIN_GAUGE_SLEEP);
-}
+  setTimeout(() => collectData(), DATA_COLLECT_SLEEP);
+};
 
-setTimeout(() => collectData(), RAIN_GAUGE_SLEEP);
\ No newline at end of file
+const purger = async () => {
+  const startTime = subHours(new Date(), 24);
+  await DataModel.deleteMany({
+    timestamp: {
+      $lt: startTime,
+    },
+  });
+};
+
+setTimeout(() => collectData(), DATA_COLLECT_SLEEP);
+setInterval(() => purger(), PURGE_SLEEP);
\ No newline at end of file