diff --git a/src/pudl/output/ferc714.py b/src/pudl/output/ferc714.py
index 8049536b46..7d027f413a 100644
--- a/src/pudl/output/ferc714.py
+++ b/src/pudl/output/ferc714.py
@@ -652,18 +652,20 @@ def summarized_demand_ferc714(
             demand_hourly_pa_ferc714.loc[
                 :, ["report_date", "respondent_id_ferc714", "demand_mwh"]
             ],
+            on=["report_date", "respondent_id_ferc714"],
             how="left",
         )
-        .groupby(["report_date", "respondent_id_ferc714"])
-        .agg({"demand_mwh": sum})
+        .groupby(["report_date", "respondent_id_ferc714"], as_index=False)[
+            ["demand_mwh"]
+        ]
+        .sum(min_count=1)
         .rename(columns={"demand_mwh": "demand_annual_mwh"})
-        .reset_index()
         .merge(
             georeferenced_counties_ferc714.groupby(
-                ["report_date", "respondent_id_ferc714"]
-            )
-            .agg({"population": sum, "area_km2": sum})
-            .reset_index()
+                ["report_date", "respondent_id_ferc714"], as_index=False
+            )[["population", "area_km2"]].sum(min_count=1),
+            on=["report_date", "respondent_id_ferc714"],
+            how="left",
         )
         .assign(
             population_density_km2=lambda x: x.population / x.area_km2,
diff --git a/test/validate/service_territory_test.py b/test/validate/service_territory_test.py
index 4dbee9a988..78aa9022cd 100644
--- a/test/validate/service_territory_test.py
+++ b/test/validate/service_territory_test.py
@@ -13,7 +13,7 @@
     "df_name,expected_rows",
     [
         ("summarized_demand_ferc714", 3_195),
-        ("fipsified_respondents_ferc714", 135_627),
+        ("fipsified_respondents_ferc714", 135_537),
         ("compiled_geometry_balancing_authority_eia861", 112_507),
         ("compiled_geometry_utility_eia861", 247_705),
     ],