diff --git a/homeassistant/components/climacell/const.py b/homeassistant/components/climacell/const.py
index 0352807138a..5b62d05a78c 100644
--- a/homeassistant/components/climacell/const.py
+++ b/homeassistant/components/climacell/const.py
@@ -128,6 +128,11 @@ CC_ATTR_POLLEN_GRASS = "grassIndex"
 CC_ATTR_FIRE_INDEX = "fireIndex"
 
 CC_SENSOR_TYPES = [
+    {
+        ATTR_FIELD: CC_ATTR_OZONE,
+        ATTR_NAME: "Ozone",
+        CONF_UNIT_OF_MEASUREMENT: CONCENTRATION_PARTS_PER_BILLION,
+    },
     {
         ATTR_FIELD: CC_ATTR_PARTICULATE_MATTER_25,
         ATTR_NAME: "Particulate Matter < 2.5 μm",
@@ -262,6 +267,11 @@ CC_V3_ATTR_POLLEN_GRASS = "pollen_grass"
 CC_V3_ATTR_FIRE_INDEX = "fire_index"
 
 CC_V3_SENSOR_TYPES = [
+    {
+        ATTR_FIELD: CC_V3_ATTR_OZONE,
+        ATTR_NAME: "Ozone",
+        CONF_UNIT_OF_MEASUREMENT: CONCENTRATION_PARTS_PER_BILLION,
+    },
     {
         ATTR_FIELD: CC_V3_ATTR_PARTICULATE_MATTER_25,
         ATTR_NAME: "Particulate Matter < 2.5 μm",
diff --git a/tests/components/climacell/test_sensor.py b/tests/components/climacell/test_sensor.py
index d06742ba209..653a989c4b7 100644
--- a/tests/components/climacell/test_sensor.py
+++ b/tests/components/climacell/test_sensor.py
@@ -26,6 +26,7 @@ from tests.common import MockConfigEntry
 _LOGGER = logging.getLogger(__name__)
 CC_SENSOR_ENTITY_ID = "sensor.climacell_{}"
 
+O3 = "ozone"
 CO = "carbon_monoxide"
 NO2 = "nitrogen_dioxide"
 SO2 = "sulfur_dioxide"
@@ -72,6 +73,7 @@ async def _setup(hass: HomeAssistant, config: dict[str, Any]) -> State:
         assert await hass.config_entries.async_setup(config_entry.entry_id)
         await hass.async_block_till_done()
         for entity_name in (
+            O3,
             CO,
             NO2,
             SO2,
@@ -90,7 +92,7 @@ async def _setup(hass: HomeAssistant, config: dict[str, Any]) -> State:
         ):
             _enable_entity(hass, CC_SENSOR_ENTITY_ID.format(entity_name))
         await hass.async_block_till_done()
-        assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 15
+        assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 16
 
 
 def check_sensor_state(hass: HomeAssistant, entity_name: str, value: str):
@@ -107,6 +109,7 @@ async def test_v3_sensor(
 ) -> None:
     """Test v3 sensor data."""
     await _setup(hass, API_V3_ENTRY_DATA)
+    check_sensor_state(hass, O3, "52.625")
     check_sensor_state(hass, CO, "0.875")
     check_sensor_state(hass, NO2, "14.1875")
     check_sensor_state(hass, SO2, "2")
@@ -130,6 +133,7 @@ async def test_v4_sensor(
 ) -> None:
     """Test v4 sensor data."""
     await _setup(hass, API_V4_ENTRY_DATA)
+    check_sensor_state(hass, O3, "46.53")
     check_sensor_state(hass, CO, "0.63")
     check_sensor_state(hass, NO2, "10.67")
     check_sensor_state(hass, SO2, "1.65")