diff --git a/apps/fo/app/pages/(with-layout)/facilityPrecipitation/modal/page.tsx b/apps/fo/app/pages/(with-layout)/facilityPrecipitation/modal/page.tsx
index 980be5865..0b4ef5830 100644
--- a/apps/fo/app/pages/(with-layout)/facilityPrecipitation/modal/page.tsx
+++ b/apps/fo/app/pages/(with-layout)/facilityPrecipitation/modal/page.tsx
@@ -28,8 +28,8 @@ export default function PrecipitationModal(props: PrecipitationModalProps) {
   const endPickerRef = useRef<HTMLDivElement>(null);
 
   // States
-  const [startDate, setStartDate] = useState<Date | null>(null);
-  const [endDate, setEndDate] = useState<Date | null>(null);
+  const [startDate, setStartDate] = useState<Date | undefined>(new Date());
+  const [endDate, setEndDate] = useState<Date | undefined>(new Date());
   const didInit = useRef(false);
   const [filteredDetailList, setFilteredDetailList] = useState<PrecipitationPropsDetailProps[]>([]);
   const [copyDetailList, setCopyDetailList] = useState<PrecipitationPropsDetailProps[]>([]);
diff --git a/apps/fo/app/store/planSewage/index.tsx b/apps/fo/app/store/planSewage/index.tsx
index 885949e3b..36e5feb9f 100644
--- a/apps/fo/app/store/planSewage/index.tsx
+++ b/apps/fo/app/store/planSewage/index.tsx
@@ -1,7 +1,8 @@
 import DataForm from "@/app/components/common/DataForm";
 import type { TableUpperProps } from "../dashboard";
 import { getFetch } from "@/app/components/api";
-import { calRainEffectDay, type ApiResponse, type FlowDataItem } from "../underWaterInput";
+import { type ApiResponse, type FlowDataItem } from "../underWaterInput";
+import CalcRainEffect from "@/app/components/common/CalcRainEffect";
 export type { TableUpperProps };
 /**====================================
  * Store - 타입
@@ -182,7 +183,7 @@ export const planSewageReducer:(set:(fn: (state: PlanSewageType) => PlanSewageTy
             const data = res.data
             const processedData = await Promise.all(data.map(async (item:PlanSewageProps) => {
                 const res2 = await getFetch('fo', '/fclt/flow/' + item.bscFctCd + '/' + searchYear) as ApiResponse;
-                const calData = calRainEffectDay(res2.data, 'SUNNY');
+                const calData = CalcRainEffect(res2.data, 'SUNNY');
 
                 let sumInflAmntSunny = 0;
                 let avgInflAmntSunny = 0;