Pollen Levels for Home Assistant (Marketplace integration)

Installs: 211 sharing analytics
GitHub stars: 40
Connection: Uses the vendor's cloud
Upkeep: Updated in the last 6 months
Version: v4.0.3, October 27, 2026
Category: Weather and alerts, Air quality and pollen
Kind: Marketplace integration
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: pollenlevels
Source: github.com/eXPerience83/pollenlevels
Issues: Report an issue

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation.

About

Pollen Levels is an integration that shows current and forecast pollen levels from the Google Maps Pollen API. It adds sensors for grass, tree and weed pollen and for regional plant species, plus summary sensors for plants in season today, overall pollen risk today and top pollen types today. Forecast data covers up to five days and is exposed as attributes, with extra values for tomorrow, trend and expected peak. A button refreshes one location, and a Force Update action refreshes all configured locations. Several locations can be tracked, and the update interval and response language can be changed afterward in the options. Setup happens in the UI and needs a Google Cloud API key with the Pollen API enabled.

Automatic summary of the README and code of eXPerience83/pollenlevels. Something wrong, or are you the maintainer and want your own text here? Get in touch

Supports

Uses the vendor's cloud Needs an internet connection and an account with the vendor.
From the Marketplace Installed through the Marketplace, formerly HACS.
Actively maintained Its author released or pushed a change in the last six months.

Provides

Sensors

Setting it up

Install it from the Marketplace and restart Home Assistant, then add it under Settings, Devices and services.

Pollen Levels Configuration

API Key
Name
Location
Update interval (hours)
API response language code

Reauthenticate Pollen Levels

API Key

Also asked when changing the connection.

After setup

Update interval (hours)
API response language code

Texts from the code of eXPerience83/pollenlevels.

Entities

ButtonsUpdate now
SensorsRegion, Date, Last Updated, Plants in season today, Overall pollen risk today, Top pollen types today

Actions

Force UpdateManually refresh pollen data for all configured locations.

Troubleshooting

DiagnosticsDownloads a diagnostics file to attach to a bug report.
Repair noticesNotices it can show in Settings, Repairs:Invalid stored Pollen Levels location, Pollen Levels location could not be loaded, Per-day forecast sensors were removed

From the README

Monitor current and forecast pollen levels from the Google Maps Pollen API directly in Home Assistant. Track grass, tree, and weed pollen, regional plant species, daily summaries, and up to 5 days of forecast data across multiple locations.
Multi-language support — UI in 21 languages (EN, ES, CA, DE, FR, IT, PL, RU, UK, NL, ZH-Hans, SV, CS, PT-BR, DA, NB, PT-PT, RO, FI, HU, ZH-Hant) + API responses in any language.
Dynamic sensors — Auto-creates sensors for all pollen types found in your location.
Daily summary sensors — Adds plants in season today, overall pollen risk today, and top pollen types today.
Five-day forecast for TYPES, PLANTS, and summary sensors — Pollen Levels always requests the maximum 5-day forecast horizon supported by the Google Maps Pollen API.
forecast list with {offset, date, has_index, value, category, description, color_*}
Convenience: tomorrow_* and d2_*
Derived: trend and expected_peak
PLANTS expose forecast as attributes only (no extra entities).
Smart grouping — Organizes sensors into:
Pollen Types (Grass / Tree / Weed)
Plants (Oak, Pine, Birch, etc.)
Pollen Info (Region / Date metadata)