diff --git a/apps/fo/app/pages/(with-layout)/dashboard/maingraph/page.tsx b/apps/fo/app/pages/(with-layout)/dashboard/maingraph/page.tsx
index 3f193e035..b0759e336 100644
--- a/apps/fo/app/pages/(with-layout)/dashboard/maingraph/page.tsx
+++ b/apps/fo/app/pages/(with-layout)/dashboard/maingraph/page.tsx
@@ -63,7 +63,7 @@ export default function DashBoardChart({searchYear = '', fcltyList = []}: facili
       color: colors[2],
     },
     lineVal0: {
-      label: '시설용량',
+      label: '지하수유입량',
       color: colors[1],
     },
     lineVal1: {
diff --git a/apps/fo/app/pages/(with-layout)/dashboard/page.tsx b/apps/fo/app/pages/(with-layout)/dashboard/page.tsx
index 2003addee..7a2c3d8a0 100644
--- a/apps/fo/app/pages/(with-layout)/dashboard/page.tsx
+++ b/apps/fo/app/pages/(with-layout)/dashboard/page.tsx
@@ -240,7 +240,7 @@ export default function DashBoard() {
 
         const sheetParameter = [
           {
-            data: [['날짜', '강수량', '유입하수량', '시설용량', '유입BOD', '유입T-P','총인유입T-P', '방류T-P', '유입T-N', '방류T-N'],...yearValueData],
+            data: [['날짜', '강수량', '유입하수량', '지하수유입량', '유입BOD', '유입T-P','총인유입T-P', '방류T-P', '유입T-N', '방류T-N'],...yearValueData],
             headerNum: 1,
             headerRange: 'A1:J1',
             sheetName: '주요그래프'
diff --git a/apps/fo/app/store/dashboard/index.tsx b/apps/fo/app/store/dashboard/index.tsx
index b263c2288..f07e8a933 100644
--- a/apps/fo/app/store/dashboard/index.tsx
+++ b/apps/fo/app/store/dashboard/index.tsx
@@ -1868,6 +1868,20 @@ export const dashBoardReducer:(set:(fn: (state: DashBoardType) => DashBoardType)
             const res = await fetchMainGraph(searchYear, fcltyCd);
             const res2 = await fetchFacilityWaterQltyInfo(fcltyCd);
 
+            let chungcunSumFlow = 0;
+            const calData = CalcRainEffect(res.data.wqltObjs, 'SUNNY')
+            calData.forEach((flowItem: any) => {
+                chungcunSumFlow += flowItem.inflAmnt && flowItem.inflAmnt !== 'x' ? Number(flowItem.inflAmnt.toString().trim()) : 0;
+            });
+            const usage = chungcunSumFlow&&chungcunSumFlow>0?chungcunSumFlow / calData.length:0;
+            
+            //bscFctCd === '11200PB001R') 중랑 - 테스트할 때 코드넣고 해야 보기편해요~
+            /* if(bscFctCd === '11200PB001R') {
+                console.log('calData.length : ', calData.length);
+                console.log('usage : ', usage, 'summerUsage : ', summerUsage, 'winterUsage : ', winterUsage);
+            } */
+            const underWaterInputYear = Math.round((usage-(usage*0.65*OSU_PERCENT)) * 1) / 1;
+
             // 법적방류수질 데이터
             const sortedWaterQltyInfo = [...res2].sort((a, b) => {
                 // 숫자로 변환하여 비교
@@ -1908,7 +1922,7 @@ export const dashBoardReducer:(set:(fn: (state: DashBoardType) => DashBoardType)
             const chart_inflowRain = res.data.wqltObjs.map((item: FacilityWaterQltyProps) => ({
                 label: item.msrDt.substring(0, 4)+"-"+item.msrDt.substring(4, 6)+"-"+item.msrDt.substring(6, 8),
                 barVal0: item.infoRnDay ?? 0,
-                lineVal0: item.fctCpc ?? 0,
+                lineVal0: underWaterInputYear,
                 lineVal1: item.inflAmnt ?? 0,
             }));
             
diff --git a/apps/fo/app/store/underWaterInput/index.tsx b/apps/fo/app/store/underWaterInput/index.tsx
index 816860469..dc29412ad 100644
--- a/apps/fo/app/store/underWaterInput/index.tsx
+++ b/apps/fo/app/store/underWaterInput/index.tsx
@@ -288,6 +288,7 @@ export const underWaterReducer:(set:(fn: (state: UnderWaterType) => UnderWaterTy
                 const bscFctCd = item.bscFctCd;
                 const res2 = await getFetch('fo', '/fclt/flow/' + bscFctCd + '/' + searchYear) as ApiResponse;
                 const calData = CalcRainEffect(res2.data, 'SUNNY');
+                
                 let chungcunSumFlow = 0;
 
                 let sumSummerChungcunDay = 0;