diff --git a/apps/st/src/components/module/SearchForm.tsx b/apps/st/src/components/module/SearchForm.tsx
index b2a470360..530b3579b 100644
--- a/apps/st/src/components/module/SearchForm.tsx
+++ b/apps/st/src/components/module/SearchForm.tsx
@@ -40,10 +40,11 @@ const SearchForm = (props: SearchFormProps = {}) => {
     
     const [values, setValues] = useState<SearchFormValues>({
         sido: props.defaultValues?.sido || "",
-        gugun: props.defaultValues?.gugun || "",
+        gugun: props.defaultValues?.gugun || '',
         year: props.defaultValues?.year || String(defaultYear),
-        order: props.defaultValues?.order || "",
-        fctName: props.defaultValues?.fctName || "",
+        order: props.defaultValues?.order || '',
+        fctName: props.defaultValues?.fctName || '',
+        bsnmCd: props.defaultValues?.bsnmCd || '',
     });
 
     const { data: sidoList } = useSWR<ApiResponse<Sido[]>>(
@@ -98,16 +99,28 @@ const SearchForm = (props: SearchFormProps = {}) => {
 
     const handleReset = () => {
         const resetValues: SearchFormValues = {
-            sido: "",
-            gugun: "",
+            sido: '',
+            gugun: '',
             year: String(defaultYear),
-            order: "",
-            fctName: "",
+            order: '',
+            fctName: '',
+            bsnmCd: '',
         };
         setValues(resetValues);
         props.onReset?.();
     };
 
+    const handleSidoChange = (value: string) => {
+        const selectedBsnm = sidoList?.data.find((v) => v.sido === value)?.bsnmCd || '';
+
+        setValues((prev) => ({
+            ...prev,
+            sido: value,
+            gugun: '',
+            bsnmCd: selectedBsnm,
+        }));
+    };
+
     return (
         <div className="card card-border">
             <form onSubmit={handleSubmit}>
@@ -117,7 +130,7 @@ const SearchForm = (props: SearchFormProps = {}) => {
                             <Label className="text-label">
                                 시도
                             </Label>
-                            <Select value={values.sido} onValueChange={(value) => setValues((prev) => ({ ...prev, sido: value, gugun: "" }))}>
+                            <Select value={values.sido} onValueChange={handleSidoChange}>
                                 <SelectTrigger className="w-[12rem]">
                                     <SelectValue placeholder="선택"></SelectValue>
                                 </SelectTrigger>
diff --git a/apps/st/src/components/statistics/input/SeweragePenetrationRateInp.tsx b/apps/st/src/components/statistics/input/SeweragePenetrationRateInp.tsx
index 047f241b8..b0069a82a 100644
--- a/apps/st/src/components/statistics/input/SeweragePenetrationRateInp.tsx
+++ b/apps/st/src/components/statistics/input/SeweragePenetrationRateInp.tsx
@@ -34,7 +34,7 @@ const SeweragePenetrationRateInp = () => {
                 const response = await statisticsInputAPi.getSewerageSupplyRateList({
                     sido: values.sido,
                     gugun: values.gugun === 'ALL' ? '' : values.gugun,
-                    bsnmCd: '4139000000',
+                    bsnmCd: values.bsnmCd,
                     yr: values.year,
                     demoYr: values.year,
                 });
diff --git a/apps/st/src/components/type/SearchForm.type.ts b/apps/st/src/components/type/SearchForm.type.ts
index 157c57ec3..689bee00f 100644
--- a/apps/st/src/components/type/SearchForm.type.ts
+++ b/apps/st/src/components/type/SearchForm.type.ts
@@ -4,6 +4,7 @@ export type SearchFormValues = {
     year?: string;
     order?: string;
     fctName?: string;
+    bsnmCd?: string;
 };
 
 export type SearchFormProps = {
diff --git a/apps/st/src/entities/statistics/model/statistics-interface.ts b/apps/st/src/entities/statistics/model/statistics-interface.ts
index ee956bdd0..5ff8a5ed7 100644
--- a/apps/st/src/entities/statistics/model/statistics-interface.ts
+++ b/apps/st/src/entities/statistics/model/statistics-interface.ts
@@ -1,11 +1,13 @@
 export interface Sido {
     adstDstrCd: string;
     sido: string;
+    bsnmCd: string;
 }
 
 export interface Sgg {
     adstDstrCd: string;
     gugun: string;
+    bsnmCd: string;
 }
 
 export interface ApiResponse<T> {