diff --git a/apps/sn/app/(with-base-layout)/ii/rdii/page.tsx b/apps/sn/app/(with-base-layout)/ii/rdii/page.tsx
index 0ce49c797..f2ed4cf35 100644
--- a/apps/sn/app/(with-base-layout)/ii/rdii/page.tsx
+++ b/apps/sn/app/(with-base-layout)/ii/rdii/page.tsx
@@ -341,35 +341,6 @@ export default function RTKForm() {
     console.log('Page changed:', page)
   }
 
-  // 선택된 값을 처리하는 공통 함수
-  const handleSelectValueChange = (
-    val: string | number,
-    setter: (value: string | number) => void
-  ) => {
-    // val이 0이 아닐 경우 .을 기준으로 슬라이싱해서 두번째 값을 설정
-    if (val && val !== '0' && val !== 0) {
-      const valString = String(val);
-      const parts = valString.split('.');
-      if (parts.length > 1 && parts[1] !== undefined) {
-        setter(parts[1]); // 두 번째 값 (인덱스 1)
-      } else {
-        setter(val); // .이 없으면 원래 값 사용
-      }
-    } else {
-      setter('0'); // val이 0이면 '0' 설정
-    }
-  };
-
-  // 하수처리장 변경 핸들러
-  const handleSwageTreatmentPlantChange = (val: string | number) => {
-    handleSelectValueChange(val, setSelect4);
-  };
-
-  // 하수처리구역 변경 핸들러
-  const handleSwageProcessingZoneChange = (val: string | number) => {
-    handleSelectValueChange(val, setSelect5);
-  };
-
   return (
     // <BaseLayout searchBox={{ title: '분석 대상지역 선택' }} titleName={{ mainTitle: 'RDII 분석', firstCardTitle: 'RDII 분석자료 입력', secondCardTitle: '실측자료 등록' }} form={form} onSubmitEvent={() => { }} graphBtn={false} >
     <BaseLayout
@@ -386,9 +357,9 @@ export default function RTKForm() {
       sigungu={select3}
       setSigungu={setSelect3}
       selectedSwageTreatmentPlant={select4}
-      onSwageTreatmentPlantChange={handleSwageTreatmentPlantChange}
+      onSwageTreatmentPlantChange={setSelect4}
       selectedSwageProcessingZone={select5}
-      onSwageProcessingZoneChange={handleSwageProcessingZoneChange}
+      onSwageProcessingZoneChange={setSelect4}
       isLoading={isLoadingResult}
       onAnalysis={handleAnalysisClick}
     >