diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdEngInfoBHRequest.java b/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdEngInfoBHRequest.java
index 4a7f7127..ceb43999 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdEngInfoBHRequest.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/domain/SdEngInfoBHRequest.java
@@ -14,7 +14,7 @@ public class SdEngInfoBHRequest {
     private String hbrvcd;
     private String rvcd;
     private String reachcd;
-    private List<String> basIds;
+    private List<String> baseIds;
     private List<String> hbrvcds;
     private List<String> rvcds;
 //    private List<String> rvcds;
diff --git a/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java b/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java
index f7c00095..07bd92ea 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_base/service/impl/SdEngInfoBHServiceImpl.java
@@ -198,6 +198,7 @@ public class SdEngInfoBHServiceImpl extends ServiceImpl<SdEngInfoBHMapper, SdEng
     @Cacheable(cacheNames = "engInfoCache#3600", keyGenerator = "cacheKeyGenerator")
     public List<SdEngInfoBH> selectForDropdownCached(SdEngInfoBHRequest sdEngInfoBHRequest) {
         String baseId = sdEngInfoBHRequest.getBaseId();
+        List<String> baseIds = sdEngInfoBHRequest.getBaseIds();
         String hbrvcd = sdEngInfoBHRequest.getHbrvcd();
         String ennm = sdEngInfoBHRequest.getEnnm();
         String rvcd = sdEngInfoBHRequest.getRvcd();
@@ -210,6 +211,7 @@ public class SdEngInfoBHServiceImpl extends ServiceImpl<SdEngInfoBHMapper, SdEng
                 .eq(StrUtil.isNotBlank(reachcd), SdEngInfoBH::getReachcd, reachcd)
                 .eq(StrUtil.isNotBlank(rvcd), SdEngInfoBH::getRvcd, rvcd)
                 .in(rvcds != null && !rvcds.isEmpty(), SdEngInfoBH::getReachcd, rvcds)
+                .in(baseIds != null && !baseIds.isEmpty(), SdEngInfoBH::getBaseId, baseIds)
                 .in(hbrvcds != null && !hbrvcds.isEmpty(), SdEngInfoBH::getHbrvcd, hbrvcds)
                 .like(StringUtils.hasText(ennm), SdEngInfoBH::getEnnm, ennm)
                 .select(SdEngInfoBH::getStcd, SdEngInfoBH::getEnnm, SdEngInfoBH::getReachcdName, SdEngInfoBH::getYrgeb, SdEngInfoBH::getBaseId)
diff --git a/backend/src/main/java/com/yfd/platform/qgc_env/wq/controller/EnvWqDataController.java b/backend/src/main/java/com/yfd/platform/qgc_env/wq/controller/EnvWqDataController.java
index e3f9247b..1a4f6f9e 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_env/wq/controller/EnvWqDataController.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_env/wq/controller/EnvWqDataController.java
@@ -157,6 +157,12 @@ public class EnvWqDataController {
         return ResponseResult.successData(envWqDataService.getWqWarRuleList(dataSourceRequest));
     }
 
+    @PostMapping("/default/stcd")
+    @Operation(summary = "获取水质达标率默认有数据的电站")
+    public ResponseResult getDefaultStcd(@RequestBody DataSourceRequest dataSourceRequest) {
+        return ResponseResult.successData(envWqDataService.getDefaultStcd(dataSourceRequest));
+    }
+
     @PostMapping("/anchorPoint/GetKendoListCust")
     @Operation(summary = "水质锚点")
     public ResponseResult getAnchorPointKendoListCust(@RequestBody DataSourceRequest dataSourceRequest) {
diff --git a/backend/src/main/java/com/yfd/platform/qgc_env/wq/entity/vo/WqDefaultStcdVo.java b/backend/src/main/java/com/yfd/platform/qgc_env/wq/entity/vo/WqDefaultStcdVo.java
new file mode 100644
index 00000000..9ca7f311
--- /dev/null
+++ b/backend/src/main/java/com/yfd/platform/qgc_env/wq/entity/vo/WqDefaultStcdVo.java
@@ -0,0 +1,22 @@
+package com.yfd.platform.qgc_env.wq.entity.vo;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+import java.io.Serializable;
+
+/**
+ * 水质达标率默认有数据的电站 VO
+ */
+@Data
+@Schema(description = "水质默认电站信息")
+public class WqDefaultStcdVo implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    @Schema(description = "站码")
+    private String stcd;
+
+    @Schema(description = "站名")
+    private String stnm;
+}
diff --git a/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/EnvWqDataService.java b/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/EnvWqDataService.java
index 0ba9565b..158a0f49 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/EnvWqDataService.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/EnvWqDataService.java
@@ -6,6 +6,7 @@ import com.yfd.platform.qgc_base.entity.vo.BatchDeleteAo;
 import com.yfd.platform.qgc_env.wq.entity.ao.JobBaseAo;
 import com.yfd.platform.qgc_env.wq.entity.vo.WqBaseInfoVo;
 import com.yfd.platform.qgc_env.wq.entity.vo.EnvWqAnchorPointVo;
+import com.yfd.platform.qgc_env.wq.entity.vo.WqDefaultStcdVo;
 
 import java.util.Map;
 
@@ -47,5 +48,10 @@ public interface EnvWqDataService {
 
     DataSourceResult<EnvWqAnchorPointVo> getAnchorPointKendoListCust(DataSourceRequest dataSourceRequest);
 
+    /**
+     * 获取水质达标率默认有数据的电站
+     */
+    DataSourceResult<WqDefaultStcdVo> getDefaultStcd(DataSourceRequest dataSourceRequest);
+
     void wqLastData(JobBaseAo ao);
 }
diff --git a/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/impl/EnvWqDataServiceImpl.java b/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/impl/EnvWqDataServiceImpl.java
index 4d553f10..a330286c 100644
--- a/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/impl/EnvWqDataServiceImpl.java
+++ b/backend/src/main/java/com/yfd/platform/qgc_env/wq/service/impl/EnvWqDataServiceImpl.java
@@ -4997,4 +4997,63 @@ public class EnvWqDataServiceImpl implements EnvWqDataService {
             redisCacheUtil.setString("wqLastDate:" + wqDataVo.getStcd(), JSONUtil.toJsonStr(wqDataVo));
         }
     }
+
+    @Override
+    public DataSourceResult<WqDefaultStcdVo> getDefaultStcd(DataSourceRequest dataSourceRequest) {
+        DataSourceResult<WqDefaultStcdVo> result = new DataSourceResult<>();
+        result.setAggregates(new HashMap<>());
+
+        if (dataSourceRequest == null) {
+            result.setData(new ArrayList<>());
+            result.setTotal(0L);
+            return result;
+        }
+
+        // 构建过滤条件
+        Map<String, Object> paramMap = new HashMap<>();
+        String filterSql = QgcQueryWrapperUtil.buildFilterCondition(
+                dataSourceRequest.getFilter(),
+                paramMap,
+                new int[]{0},
+                this::mapWqDefaultStcdColumn
+        );
+
+        String sql = "SELECT sb.STCD AS stcd, sb.STNM AS stnm " +
+                "FROM MS_WQ_T wq " +
+                "INNER JOIN SD_WQ_B_H sb ON wq.STCD = sb.STCD " +
+                "WHERE sb.STTP = 'WQ' " +
+                "  AND sb.USFL = 1 " +
+                "  AND NVL(sb.IS_DELETED, 0) = 0 " +
+                "  AND NVL(wq.IS_DELETED, 0) = 0 ";
+
+        // 拼接动态过滤条件
+        if (StrUtil.isNotBlank(filterSql)) {
+            sql += " AND " + filterSql + " ";
+        }
+
+        sql += " AND ROWNUM = 1";
+
+        List<WqDefaultStcdVo> dataList = microservicDynamicSQLMapper
+                .pageAllListWithResultType(null, sql, paramMap, WqDefaultStcdVo.class);
+
+        result.setData(dataList);
+        result.setTotal(dataList != null ? dataList.size() : 0L);
+        return result;
+    }
+
+    /**
+     * 水质默认电站过滤字段映射
+     */
+    private String mapWqDefaultStcdColumn(String field) {
+        if (StrUtil.isBlank(field)) {
+            return null;
+        }
+        return switch (field.toLowerCase()) {
+            case "tm" -> "wq.TM";
+            case "stcd" -> "sb.STCD";
+            case "base_id", "baseid" -> "sb.BASE_ID";
+            case "rstcd" -> "sb.RSTCD";
+            default -> null;
+        };
+    }
 }