diff --git a/homeassistant/components/tomorrowio/sensor.py b/homeassistant/components/tomorrowio/sensor.py
index a174d983131..260ce7390eb 100644
--- a/homeassistant/components/tomorrowio/sensor.py
+++ b/homeassistant/components/tomorrowio/sensor.py
@@ -169,7 +169,9 @@ SENSOR_TYPES = (
         key=TMRW_ATTR_PRECIPITATION_TYPE,
         name="Precipitation Type",
         value_map=PrecipitationType,
-        device_class="tomorrowio__precipitation_type",
+        device_class=SensorDeviceClass.ENUM,
+        options=["freezing_rain", "ice_pellets", "none", "rain", "snow"],
+        translation_key="precipitation_type",
         icon="mdi:weather-snowy-rainy",
     ),
     # Data comes in as ppb, convert to µg/m^3
@@ -233,7 +235,16 @@ SENSOR_TYPES = (
         key=TMRW_ATTR_EPA_HEALTH_CONCERN,
         name="US EPA Health Concern",
         value_map=HealthConcernType,
-        device_class="tomorrowio__health_concern",
+        device_class=SensorDeviceClass.ENUM,
+        options=[
+            "good",
+            "hazardous",
+            "moderate",
+            "unhealthy_for_sensitive_groups",
+            "unhealthy",
+            "very_unhealthy",
+        ],
+        translation_key="health_concern",
         icon="mdi:hospital",
     ),
     TomorrowioSensorEntityDescription(
@@ -250,28 +261,43 @@ SENSOR_TYPES = (
         key=TMRW_ATTR_CHINA_HEALTH_CONCERN,
         name="China MEP Health Concern",
         value_map=HealthConcernType,
-        device_class="tomorrowio__health_concern",
+        device_class=SensorDeviceClass.ENUM,
+        options=[
+            "good",
+            "hazardous",
+            "moderate",
+            "unhealthy_for_sensitive_groups",
+            "unhealthy",
+            "very_unhealthy",
+        ],
+        translation_key="health_concern",
         icon="mdi:hospital",
     ),
     TomorrowioSensorEntityDescription(
         key=TMRW_ATTR_POLLEN_TREE,
         name="Tree Pollen Index",
         value_map=PollenIndex,
-        device_class="tomorrowio__pollen_index",
+        device_class=SensorDeviceClass.ENUM,
+        options=["high", "low", "medium", "none", "very_high", "very_low"],
+        translation_key="pollen_index",
         icon="mdi:flower-pollen",
     ),
     TomorrowioSensorEntityDescription(
         key=TMRW_ATTR_POLLEN_WEED,
         name="Weed Pollen Index",
         value_map=PollenIndex,
-        device_class="tomorrowio__pollen_index",
+        device_class=SensorDeviceClass.ENUM,
+        options=["high", "low", "medium", "none", "very_high", "very_low"],
+        translation_key="pollen_index",
         icon="mdi:flower-pollen",
     ),
     TomorrowioSensorEntityDescription(
         key=TMRW_ATTR_POLLEN_GRASS,
         name="Grass Pollen Index",
         value_map=PollenIndex,
-        device_class="tomorrowio__pollen_index",
+        device_class=SensorDeviceClass.ENUM,
+        options=["high", "low", "medium", "none", "very_high", "very_low"],
+        translation_key="pollen_index",
         icon="mdi:flower-pollen",
     ),
     TomorrowioSensorEntityDescription(
diff --git a/homeassistant/components/tomorrowio/strings.json b/homeassistant/components/tomorrowio/strings.json
index 30b729e6ef1..3ae70f214bb 100644
--- a/homeassistant/components/tomorrowio/strings.json
+++ b/homeassistant/components/tomorrowio/strings.json
@@ -27,5 +27,38 @@
         }
       }
     }
+  },
+  "entity": {
+    "sensor": {
+      "health_concern": {
+        "state": {
+          "good": "Good",
+          "moderate": "Moderate",
+          "unhealthy_for_sensitive_groups": "Unhealthy for Sensitive Groups",
+          "unhealthy": "Unhealthy",
+          "very_unhealthy": "Very Unhealthy",
+          "hazardous": "Hazardous"
+        }
+      },
+      "pollen_index": {
+        "state": {
+          "none": "None",
+          "very_low": "Very Low",
+          "low": "Low",
+          "medium": "Medium",
+          "high": "High",
+          "very_high": "Very High"
+        }
+      },
+      "precipitation_type": {
+        "state": {
+          "none": "None",
+          "rain": "Rain",
+          "snow": "Snow",
+          "freezing_rain": "Freezing Rain",
+          "ice_pellets": "Ice Pellets"
+        }
+      }
+    }
   }
 }
diff --git a/homeassistant/components/tomorrowio/strings.sensor.json b/homeassistant/components/tomorrowio/strings.sensor.json
deleted file mode 100644
index a1ee6d1b744..00000000000
--- a/homeassistant/components/tomorrowio/strings.sensor.json
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-  "state": {
-    "tomorrowio__pollen_index": {
-      "none": "None",
-      "very_low": "Very Low",
-      "low": "Low",
-      "medium": "Medium",
-      "high": "High",
-      "very_high": "Very High"
-    },
-    "tomorrowio__health_concern": {
-      "good": "Good",
-      "moderate": "Moderate",
-      "unhealthy_for_sensitive_groups": "Unhealthy for Sensitive Groups",
-      "unhealthy": "Unhealthy",
-      "very_unhealthy": "Very Unhealthy",
-      "hazardous": "Hazardous"
-    },
-    "tomorrowio__precipitation_type": {
-      "none": "None",
-      "rain": "Rain",
-      "snow": "Snow",
-      "freezing_rain": "Freezing Rain",
-      "ice_pellets": "Ice Pellets"
-    }
-  }
-}
diff --git a/homeassistant/components/tomorrowio/translations/en.json b/homeassistant/components/tomorrowio/translations/en.json
index f3706dd6a73..15d1aadeaaf 100644
--- a/homeassistant/components/tomorrowio/translations/en.json
+++ b/homeassistant/components/tomorrowio/translations/en.json
@@ -17,6 +17,39 @@
             }
         }
     },
+    "entity": {
+        "sensor": {
+            "health_concern": {
+                "state": {
+                    "good": "Good",
+                    "hazardous": "Hazardous",
+                    "moderate": "Moderate",
+                    "unhealthy": "Unhealthy",
+                    "unhealthy_for_sensitive_groups": "Unhealthy for Sensitive Groups",
+                    "very_unhealthy": "Very Unhealthy"
+                }
+            },
+            "pollen_index": {
+                "state": {
+                    "high": "High",
+                    "low": "Low",
+                    "medium": "Medium",
+                    "none": "None",
+                    "very_high": "Very High",
+                    "very_low": "Very Low"
+                }
+            },
+            "precipitation_type": {
+                "state": {
+                    "freezing_rain": "Freezing Rain",
+                    "ice_pellets": "Ice Pellets",
+                    "none": "None",
+                    "rain": "Rain",
+                    "snow": "Snow"
+                }
+            }
+        }
+    },
     "options": {
         "step": {
             "init": {