diff --git a/.strict-typing b/.strict-typing
index 8445ff511f5..6d8b22493b6 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -6,6 +6,7 @@ homeassistant.components
 homeassistant.components.acer_projector.*
 homeassistant.components.actiontec.*
 homeassistant.components.aftership.*
+homeassistant.components.air_quality.*
 homeassistant.components.airly.*
 homeassistant.components.aladdin_connect.*
 homeassistant.components.amazon_polly.*
diff --git a/homeassistant/components/air_quality/__init__.py b/homeassistant/components/air_quality/__init__.py
index d69a02f83bd..1b8ab5f9c30 100644
--- a/homeassistant/components/air_quality/__init__.py
+++ b/homeassistant/components/air_quality/__init__.py
@@ -1,40 +1,45 @@
 """Component for handling Air Quality data for your location."""
+from __future__ import annotations
+
 from datetime import timedelta
 import logging
-from typing import final
+from typing import Final, final
 
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     ATTR_ATTRIBUTION,
     CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
 )
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.config_validation import (  # noqa: F401
     PLATFORM_SCHEMA,
     PLATFORM_SCHEMA_BASE,
 )
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.entity_component import EntityComponent
+from homeassistant.helpers.typing import ConfigType, StateType
 
-_LOGGER = logging.getLogger(__name__)
+_LOGGER: Final = logging.getLogger(__name__)
 
-ATTR_AQI = "air_quality_index"
-ATTR_CO2 = "carbon_dioxide"
-ATTR_CO = "carbon_monoxide"
-ATTR_N2O = "nitrogen_oxide"
-ATTR_NO = "nitrogen_monoxide"
-ATTR_NO2 = "nitrogen_dioxide"
-ATTR_OZONE = "ozone"
-ATTR_PM_0_1 = "particulate_matter_0_1"
-ATTR_PM_10 = "particulate_matter_10"
-ATTR_PM_2_5 = "particulate_matter_2_5"
-ATTR_SO2 = "sulphur_dioxide"
+ATTR_AQI: Final = "air_quality_index"
+ATTR_CO2: Final = "carbon_dioxide"
+ATTR_CO: Final = "carbon_monoxide"
+ATTR_N2O: Final = "nitrogen_oxide"
+ATTR_NO: Final = "nitrogen_monoxide"
+ATTR_NO2: Final = "nitrogen_dioxide"
+ATTR_OZONE: Final = "ozone"
+ATTR_PM_0_1: Final = "particulate_matter_0_1"
+ATTR_PM_10: Final = "particulate_matter_10"
+ATTR_PM_2_5: Final = "particulate_matter_2_5"
+ATTR_SO2: Final = "sulphur_dioxide"
 
-DOMAIN = "air_quality"
+DOMAIN: Final = "air_quality"
 
-ENTITY_ID_FORMAT = DOMAIN + ".{}"
+ENTITY_ID_FORMAT: Final = DOMAIN + ".{}"
 
-SCAN_INTERVAL = timedelta(seconds=30)
+SCAN_INTERVAL: Final = timedelta(seconds=30)
 
-PROP_TO_ATTR = {
+PROP_TO_ATTR: Final[dict[str, str]] = {
     "air_quality_index": ATTR_AQI,
     "attribution": ATTR_ATTRIBUTION,
     "carbon_dioxide": ATTR_CO2,
@@ -50,7 +55,7 @@ PROP_TO_ATTR = {
 }
 
 
-async def async_setup(hass, config):
+async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up the air quality component."""
     component = hass.data[DOMAIN] = EntityComponent(
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
@@ -59,84 +64,86 @@ async def async_setup(hass, config):
     return True
 
 
-async def async_setup_entry(hass, entry):
+async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    return await hass.data[DOMAIN].async_setup_entry(entry)
+    component: EntityComponent = hass.data[DOMAIN]
+    return await component.async_setup_entry(entry)
 
 
-async def async_unload_entry(hass, entry):
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    return await hass.data[DOMAIN].async_unload_entry(entry)
+    component: EntityComponent = hass.data[DOMAIN]
+    return await component.async_unload_entry(entry)
 
 
 class AirQualityEntity(Entity):
     """ABC for air quality data."""
 
     @property
-    def particulate_matter_2_5(self):
+    def particulate_matter_2_5(self) -> StateType:
         """Return the particulate matter 2.5 level."""
         raise NotImplementedError()
 
     @property
-    def particulate_matter_10(self):
+    def particulate_matter_10(self) -> StateType:
         """Return the particulate matter 10 level."""
         return None
 
     @property
-    def particulate_matter_0_1(self):
+    def particulate_matter_0_1(self) -> StateType:
         """Return the particulate matter 0.1 level."""
         return None
 
     @property
-    def air_quality_index(self):
+    def air_quality_index(self) -> StateType:
         """Return the Air Quality Index (AQI)."""
         return None
 
     @property
-    def ozone(self):
+    def ozone(self) -> StateType:
         """Return the O3 (ozone) level."""
         return None
 
     @property
-    def carbon_monoxide(self):
+    def carbon_monoxide(self) -> StateType:
         """Return the CO (carbon monoxide) level."""
         return None
 
     @property
-    def carbon_dioxide(self):
+    def carbon_dioxide(self) -> StateType:
         """Return the CO2 (carbon dioxide) level."""
         return None
 
     @property
-    def attribution(self):
+    def attribution(self) -> StateType:
         """Return the attribution."""
         return None
 
     @property
-    def sulphur_dioxide(self):
+    def sulphur_dioxide(self) -> StateType:
         """Return the SO2 (sulphur dioxide) level."""
         return None
 
     @property
-    def nitrogen_oxide(self):
+    def nitrogen_oxide(self) -> StateType:
         """Return the N2O (nitrogen oxide) level."""
         return None
 
     @property
-    def nitrogen_monoxide(self):
+    def nitrogen_monoxide(self) -> StateType:
         """Return the NO (nitrogen monoxide) level."""
         return None
 
     @property
-    def nitrogen_dioxide(self):
+    def nitrogen_dioxide(self) -> StateType:
         """Return the NO2 (nitrogen dioxide) level."""
         return None
 
     @final
     @property
-    def state_attributes(self):
+    def state_attributes(self) -> dict[str, str | int | float]:
         """Return the state attributes."""
-        data = {}
+        data: dict[str, str | int | float] = {}
 
         for prop, attr in PROP_TO_ATTR.items():
             value = getattr(self, prop)
@@ -146,11 +153,11 @@ class AirQualityEntity(Entity):
         return data
 
     @property
-    def state(self):
+    def state(self) -> StateType:
         """Return the current state."""
         return self.particulate_matter_2_5
 
     @property
-    def unit_of_measurement(self):
+    def unit_of_measurement(self) -> str:
         """Return the unit of measurement of this entity."""
         return CONCENTRATION_MICROGRAMS_PER_CUBIC_METER
diff --git a/mypy.ini b/mypy.ini
index 009112c1e0a..b2590348431 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -77,6 +77,17 @@ no_implicit_optional = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.air_quality.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+no_implicit_optional = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.airly.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true