diff --git a/app/controllers/admin/waterbodies_controller.rb b/app/controllers/admin/waterbodies_controller.rb
new file mode 100644
index 0000000..4451456
--- /dev/null
+++ b/app/controllers/admin/waterbodies_controller.rb
@@ -0,0 +1,46 @@
+module Admin
+  class WaterbodiesController < Admin::ApplicationController
+    # Overwrite any of the RESTful controller actions to implement custom behavior
+    # For example, you may want to send an email after a foo is updated.
+    #
+    # def update
+    #   super
+    #   send_foo_updated_email(requested_resource)
+    # end
+
+    # Override this method to specify custom lookup behavior.
+    # This will be used to set the resource for the `show`, `edit`, and `update`
+    # actions.
+    #
+    # def find_resource(param)
+    #   Foo.find_by!(slug: param)
+    # end
+
+    # The result of this lookup will be available as `requested_resource`
+
+    # Override this if you have certain roles that require a subset
+    # this will be used to set the records shown on the `index` action.
+    #
+    # def scoped_resource
+    #   if current_user.super_admin?
+    #     resource_class
+    #   else
+    #     resource_class.with_less_stuff
+    #   end
+    # end
+
+    # Override `resource_params` if you want to transform the submitted
+    # data before it's persisted. For example, the following would turn all
+    # empty values into nil values. It uses other APIs such as `resource_class`
+    # and `dashboard`:
+    #
+    # def resource_params
+    #   params.require(resource_class.model_name.param_key).
+    #     permit(dashboard.permitted_attributes).
+    #     transform_values { |value| value == "" ? nil : value }
+    # end
+
+    # See https://administrate-prototype.herokuapp.com/customizing_controller_actions
+    # for more information
+  end
+end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 9b18f12..661fd7a 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -9,7 +9,7 @@ def authorize!
     return if controller_name == 'home' && action_name == 'index'
 
     # TODO: This is cheap, reorganize properly
-    if %w[measurements sensors sponsors].include?(controller_name) &&
+    if %w[waterbodies measurements sensors sponsors].include?(controller_name) &&
        %w[index show aggregated daily_temperatures hourly_temperatures sponsor].include?(action_name)
       return require_public_access!
     end
diff --git a/app/controllers/waterbodies_controller.rb b/app/controllers/waterbodies_controller.rb
new file mode 100644
index 0000000..a117bd8
--- /dev/null
+++ b/app/controllers/waterbodies_controller.rb
@@ -0,0 +1,9 @@
+class WaterbodiesController < ApplicationController
+  def index
+    @waterbodies = Waterbody.all.order(created_at: :asc)
+  end
+
+  def show
+    @waterbody = Waterbody.find(params[:id])
+  end
+end
diff --git a/app/dashboards/sensor_dashboard.rb b/app/dashboards/sensor_dashboard.rb
index 421d226..9eda981 100644
--- a/app/dashboards/sensor_dashboard.rb
+++ b/app/dashboards/sensor_dashboard.rb
@@ -10,6 +10,7 @@ class SensorDashboard < Administrate::BaseDashboard
   ATTRIBUTE_TYPES = {
     measurements: Field::HasMany,
     sponsor: Field::BelongsTo,
+    waterbody: Field::BelongsTo,
     id: Field::Number,
     device_name: Field::String,
     caption: Field::String,
@@ -27,6 +28,7 @@ class SensorDashboard < Administrate::BaseDashboard
   COLLECTION_ATTRIBUTES = %i[
     measurements
     sponsor
+    waterbody
     id
     device_name
   ].freeze
@@ -36,6 +38,7 @@ class SensorDashboard < Administrate::BaseDashboard
   SHOW_PAGE_ATTRIBUTES = %i[
     measurements
     sponsor
+    waterbody
     id
     device_name
     caption
@@ -50,6 +53,7 @@ class SensorDashboard < Administrate::BaseDashboard
   # on the model's form (`new` and `edit`) pages.
   FORM_ATTRIBUTES = %i[
     sponsor
+    waterbody
     device_name
     caption
     latitude
diff --git a/app/dashboards/waterbody_dashboard.rb b/app/dashboards/waterbody_dashboard.rb
new file mode 100644
index 0000000..493cc7b
--- /dev/null
+++ b/app/dashboards/waterbody_dashboard.rb
@@ -0,0 +1,76 @@
+require 'administrate/base_dashboard'
+
+class WaterbodyDashboard < Administrate::BaseDashboard
+  # ATTRIBUTE_TYPES
+  # a hash that describes the type of each of the model's fields.
+  #
+  # Each different type represents an Administrate::Field object,
+  # which determines how the attribute is displayed
+  # on pages throughout the dashboard.
+  ATTRIBUTE_TYPES = {
+    id: Field::Number,
+    description: Field::String,
+    latitude: Field::Number.with_options(decimals: 2),
+    longitude: Field::Number.with_options(decimals: 2),
+    name: Field::String,
+    sensors: Field::HasMany,
+    created_at: Field::DateTime,
+    updated_at: Field::DateTime
+  }.freeze
+
+  # COLLECTION_ATTRIBUTES
+  # an array of attributes that will be displayed on the model's index page.
+  #
+  # By default, it's limited to four items to reduce clutter on index pages.
+  # Feel free to add, remove, or rearrange items.
+  COLLECTION_ATTRIBUTES = %i[
+    id
+    name
+    description
+    sensors
+    latitude
+    longitude
+  ].freeze
+
+  # SHOW_PAGE_ATTRIBUTES
+  # an array of attributes that will be displayed on the model's show page.
+  SHOW_PAGE_ATTRIBUTES = %i[
+    id
+    name
+    description
+    sensors
+    latitude
+    longitude
+    created_at
+    updated_at
+  ].freeze
+
+  # FORM_ATTRIBUTES
+  # an array of attributes that will be displayed
+  # on the model's form (`new` and `edit`) pages.
+  FORM_ATTRIBUTES = %i[
+    name
+    description
+    latitude
+    longitude
+  ].freeze
+
+  # COLLECTION_FILTERS
+  # a hash that defines filters that can be used while searching via the search
+  # field of the dashboard.
+  #
+  # For example to add an option to search for open resources by typing "open:"
+  # in the search field:
+  #
+  #   COLLECTION_FILTERS = {
+  #     open: ->(resources) { resources.where(open: true) }
+  #   }.freeze
+  COLLECTION_FILTERS = {}.freeze
+
+  # Overwrite this method to customize how waterbodies are displayed
+  # across all pages of the admin dashboard.
+  #
+  # def display_resource(waterbody)
+  #   "Waterbody ##{waterbody.id}"
+  # end
+end
diff --git a/app/models/sensor.rb b/app/models/sensor.rb
index 807996a..979d93f 100644
--- a/app/models/sensor.rb
+++ b/app/models/sensor.rb
@@ -1,6 +1,7 @@
 class Sensor < ApplicationRecord
   has_many :measurements, dependent: :destroy
   belongs_to :sponsor, optional: true
+  belongs_to :waterbody, optional: true
 
   validates :device_name, presence: true
   validates :caption, presence: true
diff --git a/app/models/waterbody.rb b/app/models/waterbody.rb
new file mode 100644
index 0000000..fd3dd99
--- /dev/null
+++ b/app/models/waterbody.rb
@@ -0,0 +1,5 @@
+class Waterbody < ApplicationRecord
+  has_many :sensors, dependent: :nullify
+
+  validates :name, :latitude, :longitude, presence: true
+end
diff --git a/app/views/waterbodies/index.json.jbuilder b/app/views/waterbodies/index.json.jbuilder
new file mode 100644
index 0000000..94213ff
--- /dev/null
+++ b/app/views/waterbodies/index.json.jbuilder
@@ -0,0 +1,4 @@
+json.array!(@waterbodies) do |waterbody|
+  json.extract! waterbody, :id, :name, :description, :latitude, :longitude, :sensor_ids
+  json.url waterbody_url(waterbody, format: :json)
+end
diff --git a/app/views/waterbodies/show.json.jbuilder b/app/views/waterbodies/show.json.jbuilder
new file mode 100644
index 0000000..067a68b
--- /dev/null
+++ b/app/views/waterbodies/show.json.jbuilder
@@ -0,0 +1,2 @@
+json.extract! @waterbody, :id, :name, :description, :latitude, :longitude,
+              :sensor_ids, :created_at, :updated_at
diff --git a/config/routes.rb b/config/routes.rb
index 8048c9c..fe56204 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -6,6 +6,7 @@
     resources :measurements
     resources :sensors
     resources :sponsors
+    resources :waterbodies
 
     root to: "sensors#index"
   end
@@ -16,6 +17,7 @@
     end
     resources :sensors
     resources :sponsors
+    resources :waterbodies, only: [:index, :show]
 
     namespace :mobile_app do
       resources :sensors, only: [:index, :show] do
diff --git a/db/migrate/20230205145109_create_waterbodies.rb b/db/migrate/20230205145109_create_waterbodies.rb
new file mode 100644
index 0000000..59dda49
--- /dev/null
+++ b/db/migrate/20230205145109_create_waterbodies.rb
@@ -0,0 +1,12 @@
+class CreateWaterbodies < ActiveRecord::Migration[6.1]
+  def change
+    create_table :waterbodies do |t|
+      t.string :name, null: false
+      t.string :description, null: false
+      t.float :latitude, null: false
+      t.float :longitude, null: false
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/migrate/20230205152214_add_waterbody_ref_to_sensors.rb b/db/migrate/20230205152214_add_waterbody_ref_to_sensors.rb
new file mode 100644
index 0000000..ae1b5cf
--- /dev/null
+++ b/db/migrate/20230205152214_add_waterbody_ref_to_sensors.rb
@@ -0,0 +1,5 @@
+class AddWaterbodyRefToSensors < ActiveRecord::Migration[6.1]
+  def change
+    add_reference :sensors, :waterbody, foreign_key: true
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 71c133d..1a590ff 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2023_01_20_212413) do
+ActiveRecord::Schema.define(version: 2023_02_05_152214) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -42,7 +42,9 @@
     t.datetime "updated_at", null: false
     t.float "latitude", null: false
     t.float "longitude", null: false
+    t.bigint "waterbody_id"
     t.index ["sponsor_id"], name: "index_sensors_on_sponsor_id"
+    t.index ["waterbody_id"], name: "index_sensors_on_waterbody_id"
   end
 
   create_table "sponsors", id: :serial, force: :cascade do |t|
@@ -54,5 +56,15 @@
     t.string "logo_source", comment: "filename (in ./public/images/), relative path or URL"
   end
 
+  create_table "waterbodies", force: :cascade do |t|
+    t.string "name", null: false
+    t.string "description", null: false
+    t.float "latitude", null: false
+    t.float "longitude", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
   add_foreign_key "measurements", "sensors"
+  add_foreign_key "sensors", "waterbodies"
 end
diff --git a/test/controllers/admin/waterbodies_controller_test.rb b/test/controllers/admin/waterbodies_controller_test.rb
new file mode 100644
index 0000000..60ebef7
--- /dev/null
+++ b/test/controllers/admin/waterbodies_controller_test.rb
@@ -0,0 +1,17 @@
+require 'test_helper'
+
+class WaterbodiesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    @headers = admin_auth_header
+  end
+
+  test 'should get unauthorized without authentication' do
+    get admin_waterbodies_url
+    assert_response :unauthorized
+  end
+
+  test 'should get success with authentication' do
+    get admin_waterbodies_url, headers: @headers
+    assert_response :success
+  end
+end
diff --git a/test/controllers/waterbodies_controller_test.rb b/test/controllers/waterbodies_controller_test.rb
new file mode 100644
index 0000000..2804017
--- /dev/null
+++ b/test/controllers/waterbodies_controller_test.rb
@@ -0,0 +1,27 @@
+require 'test_helper'
+
+class WaterbodiesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    @waterbody = create(:waterbody)
+  end
+
+  test 'should get unauthorized without auth header' do
+    get waterbodies_url
+    assert_response :unauthorized
+  end
+
+  test 'should get index' do
+    get waterbodies_url, env: public_auth_header
+    assert_response :success
+    response_object = JSON.parse(response.body)
+    assert response_object.length == 1
+    assert response_object[0]['name'] == @waterbody.name
+  end
+
+  test 'get an individual waterbody' do
+    get waterbody_url(@waterbody), env: public_auth_header
+    assert_response :success
+    response_object = JSON.parse(response.body)
+    assert response_object['name'] == @waterbody.name
+  end
+end
diff --git a/test/factories/waterbodies.rb b/test/factories/waterbodies.rb
new file mode 100644
index 0000000..a6edafc
--- /dev/null
+++ b/test/factories/waterbodies.rb
@@ -0,0 +1,8 @@
+FactoryBot.define do
+  factory :waterbody do
+    name { 'Zürichsee' }
+    description { 'Our favorite lake' }
+    latitude { 47.222578 }
+    longitude { 8.814744 }
+  end
+end
diff --git a/test/models/waterbody_test.rb b/test/models/waterbody_test.rb
new file mode 100644
index 0000000..ece5af9
--- /dev/null
+++ b/test/models/waterbody_test.rb
@@ -0,0 +1,11 @@
+require 'test_helper'
+
+class WaterbodyTest < ActiveSupport::TestCase
+  test 'should nullify sensor waterbody references on destroy' do
+    sensor = create(:sensor)
+    waterbody = create(:waterbody, sensors: [sensor])
+    assert_equal sensor.waterbody, waterbody
+    waterbody.destroy
+    assert_nil sensor.reload.waterbody
+  end
+end