diff --git a/homeassistant/components/airnow/sensor.py b/homeassistant/components/airnow/sensor.py
index 31bb3d793a1..f3d29cc65df 100644
--- a/homeassistant/components/airnow/sensor.py
+++ b/homeassistant/components/airnow/sensor.py
@@ -6,6 +6,7 @@ from dataclasses import dataclass
 from typing import Any
 
 from homeassistant.components.sensor import (
+    SensorDeviceClass,
     SensorEntity,
     SensorEntityDescription,
     SensorStateClass,
@@ -57,10 +58,9 @@ class AirNowEntityDescription(SensorEntityDescription, AirNowEntityDescriptionMi
 SENSOR_TYPES: tuple[AirNowEntityDescription, ...] = (
     AirNowEntityDescription(
         key=ATTR_API_AQI,
-        translation_key="aqi",
         icon="mdi:blur",
-        native_unit_of_measurement="aqi",
         state_class=SensorStateClass.MEASUREMENT,
+        device_class=SensorDeviceClass.AQI,
         value_fn=lambda data: data.get(ATTR_API_AQI),
         extra_state_attributes_fn=lambda data: {
             ATTR_DESCR: data[ATTR_API_AQI_DESCRIPTION],
@@ -69,10 +69,10 @@ SENSOR_TYPES: tuple[AirNowEntityDescription, ...] = (
     ),
     AirNowEntityDescription(
         key=ATTR_API_PM25,
-        translation_key="pm25",
         icon="mdi:blur",
         native_unit_of_measurement=CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
         state_class=SensorStateClass.MEASUREMENT,
+        device_class=SensorDeviceClass.PM25,
         value_fn=lambda data: data.get(ATTR_API_PM25),
         extra_state_attributes_fn=None,
     ),
diff --git a/homeassistant/components/airnow/strings.json b/homeassistant/components/airnow/strings.json
index ff1ba6481c8..aed12596176 100644
--- a/homeassistant/components/airnow/strings.json
+++ b/homeassistant/components/airnow/strings.json
@@ -23,12 +23,6 @@
   },
   "entity": {
     "sensor": {
-      "aqi": {
-        "name": "[%key:component::sensor::entity_component::aqi::name%]"
-      },
-      "pm25": {
-        "name": "[%key:component::sensor::entity_component::pm25::name%]"
-      },
       "o3": {
         "name": "[%key:component::sensor::entity_component::ozone::name%]"
       }