diff --git a/api/environment/BUILD.gn b/api/environment/BUILD.gn
index c0aeda9..0d87ae2 100644
--- a/api/environment/BUILD.gn
+++ b/api/environment/BUILD.gn
@@ -23,6 +23,20 @@
   ]
 }
 
+rtc_library("deprecated_global_field_trials") {
+  visibility = [ ":environment_factory" ]
+  allow_poison = [ "environment_construction" ]
+  sources = [
+    "deprecated_global_field_trials.cc",
+    "deprecated_global_field_trials.h",
+  ]
+  deps = [
+    "../:field_trials_registry",
+    "../../system_wrappers:field_trial",
+    "//third_party/abseil-cpp/absl/strings:string_view",
+  ]
+}
+
 rtc_library("environment_factory") {
   visibility = [ "*" ]
   poisonous = [ "environment_construction" ]
@@ -31,6 +45,7 @@
     "environment_factory.h",
   ]
   deps = [
+    ":deprecated_global_field_trials",
     ":environment",
     "..:field_trials_view",
     "..:make_ref_counted",
@@ -42,7 +57,6 @@
     "../rtc_event_log",
     "../task_queue",
     "../task_queue:default_task_queue_factory",
-    "../transport:field_trial_based_config",
     "//third_party/abseil-cpp/absl/base:nullability",
   ]
 }
diff --git a/api/transport/field_trial_based_config.cc b/api/environment/deprecated_global_field_trials.cc
similarity index 91%
rename from api/transport/field_trial_based_config.cc
rename to api/environment/deprecated_global_field_trials.cc
index bd9adaa..aaef488 100644
--- a/api/transport/field_trial_based_config.cc
+++ b/api/environment/deprecated_global_field_trials.cc
@@ -7,7 +7,7 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
-#include "api/transport/field_trial_based_config.h"
+#include "api/environment/deprecated_global_field_trials.h"
 
 #include <cstddef>
 #include <string>
@@ -16,7 +16,7 @@
 #include "system_wrappers/include/field_trial.h"
 
 namespace webrtc {
-std::string FieldTrialBasedConfig::GetValue(absl::string_view key) const {
+std::string DeprecatedGlobalFieldTrials::GetValue(absl::string_view key) const {
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
   const char* global_field_trial_string = field_trial::GetFieldTrialString();
diff --git a/api/environment/deprecated_global_field_trials.h b/api/environment/deprecated_global_field_trials.h
new file mode 100644
index 0000000..8dd49c9
--- /dev/null
+++ b/api/environment/deprecated_global_field_trials.h
@@ -0,0 +1,27 @@
+/*
+ *  Copyright 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#ifndef API_ENVIRONMENT_DEPRECATED_GLOBAL_FIELD_TRIALS_H_
+#define API_ENVIRONMENT_DEPRECATED_GLOBAL_FIELD_TRIALS_H_
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "api/field_trials_registry.h"
+
+namespace webrtc {
+// TODO: bugs.webrtc.org/42220378 - Delete after January 1, 2026 when functions
+// to set global field trials are deleted.
+class DeprecatedGlobalFieldTrials : public FieldTrialsRegistry {
+ private:
+  std::string GetValue(absl::string_view key) const override;
+};
+}  // namespace webrtc
+
+#endif  // API_ENVIRONMENT_DEPRECATED_GLOBAL_FIELD_TRIALS_H_
diff --git a/api/environment/environment_factory.cc b/api/environment/environment_factory.cc
index 0dd380a..529bbec 100644
--- a/api/environment/environment_factory.cc
+++ b/api/environment/environment_factory.cc
@@ -14,6 +14,7 @@
 #include <utility>
 
 #include "absl/base/nullability.h"
+#include "api/environment/deprecated_global_field_trials.h"
 #include "api/environment/environment.h"
 #include "api/field_trials_view.h"
 #include "api/make_ref_counted.h"
@@ -22,7 +23,6 @@
 #include "api/scoped_refptr.h"
 #include "api/task_queue/default_task_queue_factory.h"
 #include "api/task_queue/task_queue_factory.h"
-#include "api/transport/field_trial_based_config.h"
 #include "rtc_base/checks.h"
 #include "system_wrappers/include/clock.h"
 
@@ -100,10 +100,7 @@
 
 Environment EnvironmentFactory::CreateWithDefaults() && {
   if (field_trials_ == nullptr) {
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wdeprecated-declarations"
-    Set(std::make_unique<FieldTrialBasedConfig>());
-#pragma clang diagnostic pop
+    Set(std::make_unique<DeprecatedGlobalFieldTrials>());
   }
   if (clock_ == nullptr) {
     Set(Clock::GetRealTimeClock());
diff --git a/api/transport/BUILD.gn b/api/transport/BUILD.gn
index b99d403..67a2dbf 100644
--- a/api/transport/BUILD.gn
+++ b/api/transport/BUILD.gn
@@ -60,21 +60,6 @@
   ]
 }
 
-rtc_library("field_trial_based_config") {
-  visibility = [ "*" ]
-  allow_poison = [ "environment_construction" ]
-  sources = [
-    "field_trial_based_config.cc",
-    "field_trial_based_config.h",
-  ]
-  deps = [
-    "../../api:field_trials_registry",
-    "../../rtc_base/system:rtc_export",
-    "../../system_wrappers:field_trial",
-    "//third_party/abseil-cpp/absl/strings:string_view",
-  ]
-}
-
 rtc_source_set("datagram_transport_interface") {
   visibility = [ "*" ]
   sources = [ "data_channel_transport_interface.h" ]
diff --git a/api/transport/field_trial_based_config.h b/api/transport/field_trial_based_config.h
deleted file mode 100644
index 08a37e5..0000000
--- a/api/transport/field_trial_based_config.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- *  Copyright 2019 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-#ifndef API_TRANSPORT_FIELD_TRIAL_BASED_CONFIG_H_
-#define API_TRANSPORT_FIELD_TRIAL_BASED_CONFIG_H_
-
-#include <string>
-
-#include "absl/strings/string_view.h"
-#include "api/field_trials_registry.h"
-#include "rtc_base/system/rtc_export.h"
-
-namespace webrtc {
-// Implementation using the field trial API fo the key value lookup.
-// TODO: bugs.webrtc.org/42220378 - Remove from public api after August 1, 2025.
-class [[deprecated]] RTC_EXPORT FieldTrialBasedConfig
-    : public FieldTrialsRegistry {
- private:
-  std::string GetValue(absl::string_view key) const override;
-};
-}  // namespace webrtc
-
-#endif  // API_TRANSPORT_FIELD_TRIAL_BASED_CONFIG_H_
diff --git a/modules/congestion_controller/goog_cc/BUILD.gn b/modules/congestion_controller/goog_cc/BUILD.gn
index b84156e..b1cd64c 100644
--- a/modules/congestion_controller/goog_cc/BUILD.gn
+++ b/modules/congestion_controller/goog_cc/BUILD.gn
@@ -287,7 +287,6 @@
         "../../../api/test/network_emulation",
         "../../../api/test/network_emulation:create_cross_traffic",
         "../../../api/transport:bandwidth_usage",
-        "../../../api/transport:field_trial_based_config",
         "../../../api/transport:goog_cc",
         "../../../api/transport:network_control",
         "../../../api/units:data_rate",
diff --git a/pc/BUILD.gn b/pc/BUILD.gn
index 5a06418..0c5df79 100644
--- a/pc/BUILD.gn
+++ b/pc/BUILD.gn
@@ -2528,7 +2528,6 @@
       "../api/transport:bitrate_settings",
       "../api/transport:datagram_transport_interface",
       "../api/transport:enums",
-      "../api/transport:field_trial_based_config",
       "../api/transport:sctp_transport_factory_interface",
       "../api/transport/rtp:rtp_source",
       "../api/units:data_rate",
diff --git a/rtc_tools/BUILD.gn b/rtc_tools/BUILD.gn
index 12e06d6..ae16dde 100644
--- a/rtc_tools/BUILD.gn
+++ b/rtc_tools/BUILD.gn
@@ -175,7 +175,6 @@
       "../api/environment:environment_factory",
       "../api/task_queue",
       "../api/test/video:function_video_factory",
-      "../api/transport:field_trial_based_config",
       "../api/units:time_delta",
       "../api/units:timestamp",
       "../api/video:encoded_image",
diff --git a/sdk/BUILD.gn b/sdk/BUILD.gn
index cd90d6d..17324f6 100644
--- a/sdk/BUILD.gn
+++ b/sdk/BUILD.gn
@@ -1131,7 +1131,6 @@
         "../api/environment:environment_factory",
         "../api/rtc_event_log:rtc_event_log_factory",
         "../api/task_queue:default_task_queue_factory",
-        "../api/transport:field_trial_based_config",
         "../api/transport:network_control",
         "../api/transport/rtp:rtp_source",
         "../api/video:video_frame",
diff --git a/test/BUILD.gn b/test/BUILD.gn
index 75a3fbc..4a6e127 100644
--- a/test/BUILD.gn
+++ b/test/BUILD.gn
@@ -1298,7 +1298,6 @@
       "../api/task_queue",
       "../api/test/video:function_video_factory",
       "../api/transport:bitrate_settings",
-      "../api/transport:field_trial_based_config",
       "../api/transport:network_control",
       "../api/units:time_delta",
       "../api/units:timestamp",
diff --git a/test/network/BUILD.gn b/test/network/BUILD.gn
index d707ccf..a9dcdd7 100644
--- a/test/network/BUILD.gn
+++ b/test/network/BUILD.gn
@@ -118,7 +118,6 @@
       "../../api/rtc_event_log:rtc_event_log_factory",
       "../../api/task_queue:default_task_queue_factory",
       "../../api/test/network_emulation",
-      "../../api/transport:field_trial_based_config",
       "../../modules/audio_device:test_audio_device_module",
       "../../p2p:port_allocator",
       "../../pc:pc_test_utils",