diff --git a/db/thing.py b/db/thing.py
index bedc4430d..b9394a655 100644
--- a/db/thing.py
+++ b/db/thing.py
@@ -89,8 +89,8 @@ class Thing(Base, AutoBaseMixin, ReleaseMixin, StatusHistoryMixin, PermissionMix
     well_casing_diameter: Mapped[float] = mapped_column(
         Float,
         nullable=True,
-        info={"unit": "inches"},
-        comment="Diameter of the well casing in inches.",
+        info={"unit": "feet"},
+        comment="Diameter of the well casing in feet.",
     )
     well_casing_depth: Mapped[float] = mapped_column(
         Float,
diff --git a/schemas/thing.py b/schemas/thing.py
index cd741c758..d2563cc4d 100644
--- a/schemas/thing.py
+++ b/schemas/thing.py
@@ -92,7 +92,7 @@ class CreateWell(CreateBaseThing, ValidateWell):
     )
     well_construction_notes: str | None = None
     well_casing_diameter: float | None = Field(
-        default=None, gt=0, description="Well casing diameter in inches"
+        default=None, gt=0, description="Well casing diameter in feet"
     )
     well_casing_depth: float | None = Field(
         default=None, gt=0, description="Well casing depth in feet"
@@ -148,7 +148,7 @@ class WellResponse(BaseThingResponse):
     hole_depth: float | None = None
     hole_depth_unit: str = "ft"
     well_casing_diameter: float | None = None  # in inches
-    well_casing_diameter_unit: str = "in"
+    well_casing_diameter_unit: str = "ft"
     well_casing_depth: float | None = None
     well_casing_depth_unit: str = "ft"
     well_casing_materials: list[CasingMaterial] = []
@@ -266,7 +266,7 @@ class UpdateWell(UpdateThing, ValidateWell):
     well_depth: float | None = None  # in feet
     hole_depth: float | None = None  # in feet
     well_construction_notes: str | None = None
-    well_casing_diameter: float | None = None  # in inches
+    well_casing_diameter: float | None = None  # in feet
     well_casing_depth: float | None = None  # in feet
     well_casing_materials: list[str] | None = None
 
diff --git a/tests/conftest.py b/tests/conftest.py
index fae8aedaa..7ed6a12c8 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -59,7 +59,7 @@ def water_well_thing(location):
             well_depth=10,
             hole_depth=10,
             well_construction_notes="Test well construction notes",
-            well_casing_diameter=5.0,
+            well_casing_diameter=1.0,
             well_casing_depth=10.0,
         )
         session.add(water_well)
diff --git a/tests/features/steps/api_fixture.py b/tests/features/steps/api_fixture.py
index 041f6ed59..83cb8c30b 100644
--- a/tests/features/steps/api_fixture.py
+++ b/tests/features/steps/api_fixture.py
@@ -78,7 +78,7 @@ def add_well(location, wid):
             well_depth=10,
             hole_depth=10,
             well_construction_notes="Test well construction notes",
-            well_casing_diameter=5.0,
+            well_casing_diameter=1.0,
             well_casing_depth=10.0,
         )
         session.add(well)
diff --git a/tests/test_thing.py b/tests/test_thing.py
index 03ab9ac09..eff9535ee 100644
--- a/tests/test_thing.py
+++ b/tests/test_thing.py
@@ -91,7 +91,7 @@ def test_add_water_well(location, group):
         "well_depth": 100.0,
         "hole_depth": 110,
         "well_construction_notes": "this is a test of notes",
-        "well_casing_diameter": 5.0,
+        "well_casing_diameter": 1.0,
         "well_casing_depth": 10.0,
         "well_casing_materials": ["PVC"],
         "well_purposes": ["Domestic"],
@@ -113,7 +113,7 @@ def test_add_water_well(location, group):
     assert data["well_depth_unit"] == "ft"
     assert data["well_construction_notes"] == payload["well_construction_notes"]
     assert data["well_casing_diameter"] == payload["well_casing_diameter"]
-    assert data["well_casing_diameter_unit"] == "in"
+    assert data["well_casing_diameter_unit"] == "ft"
     assert data["well_casing_depth"] == payload["well_casing_depth"]
     assert data["well_casing_depth_unit"] == "ft"
     assert data["well_casing_materials"] == payload["well_casing_materials"]
@@ -394,7 +394,7 @@ def test_get_water_wells(water_well_thing, location):
         data["items"][0]["well_casing_diameter"]
         == water_well_thing.well_casing_diameter
     )
-    assert data["items"][0]["well_casing_diameter_unit"] == "in"
+    assert data["items"][0]["well_casing_diameter_unit"] == "ft"
     assert data["items"][0]["well_casing_depth"] == water_well_thing.well_casing_depth
     assert data["items"][0]["well_casing_depth_unit"] == "ft"
     assert data["items"][0]["well_casing_materials"] == [
@@ -427,7 +427,7 @@ def test_get_water_well_by_id(water_well_thing, location):
     assert data["hole_depth_unit"] == "ft"
     assert data["well_construction_notes"] == water_well_thing.well_construction_notes
     assert data["well_casing_diameter"] == water_well_thing.well_casing_diameter
-    assert data["well_casing_diameter_unit"] == "in"
+    assert data["well_casing_diameter_unit"] == "ft"
     assert data["well_casing_depth"] == water_well_thing.well_casing_depth
     assert data["well_casing_depth_unit"] == "ft"
     assert data["well_casing_materials"] == [