diff --git a/homeassistant/components/watttime/__init__.py b/homeassistant/components/watttime/__init__.py
index 779fc0791b6..d33e6fceb2e 100644
--- a/homeassistant/components/watttime/__init__.py
+++ b/homeassistant/components/watttime/__init__.py
@@ -19,7 +19,7 @@ from homeassistant.exceptions import ConfigEntryAuthFailed
 from homeassistant.helpers import aiohttp_client
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
-from .const import DATA_COORDINATOR, DOMAIN, LOGGER
+from .const import DOMAIN, LOGGER
 
 DEFAULT_UPDATE_INTERVAL = timedelta(minutes=5)
 
@@ -28,9 +28,6 @@ PLATFORMS: list[str] = ["sensor"]
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up WattTime from a config entry."""
-    hass.data.setdefault(DOMAIN, {})
-    hass.data[DOMAIN][entry.entry_id] = {}
-
     session = aiohttp_client.async_get_clientsession(hass)
 
     try:
@@ -65,7 +62,8 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     )
 
     await coordinator.async_config_entry_first_refresh()
-    hass.data[DOMAIN][entry.entry_id][DATA_COORDINATOR] = coordinator
+    hass.data.setdefault(DOMAIN, {})
+    hass.data[DOMAIN][entry.entry_id] = coordinator
 
     hass.config_entries.async_setup_platforms(entry, PLATFORMS)
 
diff --git a/homeassistant/components/watttime/const.py b/homeassistant/components/watttime/const.py
index 07ea0e47167..5bb8cb50d40 100644
--- a/homeassistant/components/watttime/const.py
+++ b/homeassistant/components/watttime/const.py
@@ -8,5 +8,3 @@ LOGGER = logging.getLogger(__package__)
 CONF_BALANCING_AUTHORITY = "balancing_authority"
 CONF_BALANCING_AUTHORITY_ABBREV = "balancing_authority_abbreviation"
 CONF_SHOW_ON_MAP = "show_on_map"
-
-DATA_COORDINATOR = "coordinator"
diff --git a/homeassistant/components/watttime/sensor.py b/homeassistant/components/watttime/sensor.py
index b1ebc262134..0b1ae54b5d1 100644
--- a/homeassistant/components/watttime/sensor.py
+++ b/homeassistant/components/watttime/sensor.py
@@ -10,13 +10,7 @@ from homeassistant.components.sensor import (
     SensorEntityDescription,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import (
-    ATTR_ATTRIBUTION,
-    ATTR_LATITUDE,
-    ATTR_LONGITUDE,
-    MASS_POUNDS,
-    PERCENTAGE,
-)
+from homeassistant.const import ATTR_LATITUDE, ATTR_LONGITUDE, MASS_POUNDS, PERCENTAGE
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import StateType
@@ -29,14 +23,11 @@ from .const import (
     CONF_BALANCING_AUTHORITY,
     CONF_BALANCING_AUTHORITY_ABBREV,
     CONF_SHOW_ON_MAP,
-    DATA_COORDINATOR,
     DOMAIN,
 )
 
 ATTR_BALANCING_AUTHORITY = "balancing_authority"
 
-DEFAULT_ATTRIBUTION = "Pickup data provided by WattTime"
-
 SENSOR_TYPE_REALTIME_EMISSIONS_MOER = "moer"
 SENSOR_TYPE_REALTIME_EMISSIONS_PERCENT = "percent"
 
@@ -63,7 +54,7 @@ async def async_setup_entry(
     hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
 ) -> None:
     """Set up WattTime sensors based on a config entry."""
-    coordinator = hass.data[DOMAIN][entry.entry_id][DATA_COORDINATOR]
+    coordinator = hass.data[DOMAIN][entry.entry_id]
     async_add_entities(
         [
             RealtimeEmissionsSensor(coordinator, entry, description)
@@ -96,7 +87,6 @@ class RealtimeEmissionsSensor(CoordinatorEntity, SensorEntity):
     def extra_state_attributes(self) -> Mapping[str, Any] | None:
         """Return entity specific state attributes."""
         attrs = {
-            ATTR_ATTRIBUTION: DEFAULT_ATTRIBUTION,
             ATTR_BALANCING_AUTHORITY: self._entry.data[CONF_BALANCING_AUTHORITY],
         }