diff --git a/src/v2/config_service_v2_client.ts b/src/v2/config_service_v2_client.ts
index 8ea15a66..de78feb5 100644
--- a/src/v2/config_service_v2_client.ts
+++ b/src/v2/config_service_v2_client.ts
@@ -122,8 +122,15 @@ export class ConfigServiceV2Client {
         'Please set either universe_domain or universeDomain, but not both.'
       );
     }
+    const universeDomainEnvVar =
+      typeof process === 'object' && typeof process.env === 'object'
+        ? process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN']
+        : undefined;
     this._universeDomain =
-      opts?.universeDomain ?? opts?.universe_domain ?? 'googleapis.com';
+      opts?.universeDomain ??
+      opts?.universe_domain ??
+      universeDomainEnvVar ??
+      'googleapis.com';
     this._servicePath = 'logging.' + this._universeDomain;
     const servicePath =
       opts?.servicePath || opts?.apiEndpoint || this._servicePath;
@@ -175,7 +182,7 @@ export class ConfigServiceV2Client {
 
     // Determine the client header string.
     const clientHeader = [`gax/${this._gaxModule.version}`, `gapic/${version}`];
-    if (typeof process !== 'undefined' && 'versions' in process) {
+    if (typeof process === 'object' && 'versions' in process) {
       clientHeader.push(`gl-node/${process.versions.node}`);
     } else {
       clientHeader.push(`gl-web/${this._gaxModule.version}`);
@@ -578,7 +585,7 @@ export class ConfigServiceV2Client {
    */
   static get servicePath() {
     if (
-      typeof process !== undefined &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       process.emitWarning(
@@ -596,7 +603,7 @@ export class ConfigServiceV2Client {
    */
   static get apiEndpoint() {
     if (
-      typeof process !== undefined &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       process.emitWarning(
diff --git a/src/v2/logging_service_v2_client.ts b/src/v2/logging_service_v2_client.ts
index b807e9e7..8283d392 100644
--- a/src/v2/logging_service_v2_client.ts
+++ b/src/v2/logging_service_v2_client.ts
@@ -119,8 +119,15 @@ export class LoggingServiceV2Client {
         'Please set either universe_domain or universeDomain, but not both.'
       );
     }
+    const universeDomainEnvVar =
+      typeof process === 'object' && typeof process.env === 'object'
+        ? process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN']
+        : undefined;
     this._universeDomain =
-      opts?.universeDomain ?? opts?.universe_domain ?? 'googleapis.com';
+      opts?.universeDomain ??
+      opts?.universe_domain ??
+      universeDomainEnvVar ??
+      'googleapis.com';
     this._servicePath = 'logging.' + this._universeDomain;
     const servicePath =
       opts?.servicePath || opts?.apiEndpoint || this._servicePath;
@@ -172,7 +179,7 @@ export class LoggingServiceV2Client {
 
     // Determine the client header string.
     const clientHeader = [`gax/${this._gaxModule.version}`, `gapic/${version}`];
-    if (typeof process !== 'undefined' && 'versions' in process) {
+    if (typeof process === 'object' && 'versions' in process) {
       clientHeader.push(`gl-node/${process.versions.node}`);
     } else {
       clientHeader.push(`gl-web/${this._gaxModule.version}`);
@@ -457,7 +464,7 @@ export class LoggingServiceV2Client {
    */
   static get servicePath() {
     if (
-      typeof process !== undefined &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       process.emitWarning(
@@ -475,7 +482,7 @@ export class LoggingServiceV2Client {
    */
   static get apiEndpoint() {
     if (
-      typeof process !== undefined &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       process.emitWarning(
diff --git a/src/v2/metrics_service_v2_client.ts b/src/v2/metrics_service_v2_client.ts
index 46899baa..aae4b7e3 100644
--- a/src/v2/metrics_service_v2_client.ts
+++ b/src/v2/metrics_service_v2_client.ts
@@ -119,8 +119,15 @@ export class MetricsServiceV2Client {
         'Please set either universe_domain or universeDomain, but not both.'
       );
     }
+    const universeDomainEnvVar =
+      typeof process === 'object' && typeof process.env === 'object'
+        ? process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN']
+        : undefined;
     this._universeDomain =
-      opts?.universeDomain ?? opts?.universe_domain ?? 'googleapis.com';
+      opts?.universeDomain ??
+      opts?.universe_domain ??
+      universeDomainEnvVar ??
+      'googleapis.com';
     this._servicePath = 'logging.' + this._universeDomain;
     const servicePath =
       opts?.servicePath || opts?.apiEndpoint || this._servicePath;
@@ -172,7 +179,7 @@ export class MetricsServiceV2Client {
 
     // Determine the client header string.
     const clientHeader = [`gax/${this._gaxModule.version}`, `gapic/${version}`];
-    if (typeof process !== 'undefined' && 'versions' in process) {
+    if (typeof process === 'object' && 'versions' in process) {
       clientHeader.push(`gl-node/${process.versions.node}`);
     } else {
       clientHeader.push(`gl-web/${this._gaxModule.version}`);
@@ -404,7 +411,7 @@ export class MetricsServiceV2Client {
    */
   static get servicePath() {
     if (
-      typeof process !== undefined &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       process.emitWarning(
@@ -422,7 +429,7 @@ export class MetricsServiceV2Client {
    */
   static get apiEndpoint() {
     if (
-      typeof process !== undefined &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       process.emitWarning(
diff --git a/test/gapic_config_service_v2_v2.ts b/test/gapic_config_service_v2_v2.ts
index 86567af3..431eaaa7 100644
--- a/test/gapic_config_service_v2_v2.ts
+++ b/test/gapic_config_service_v2_v2.ts
@@ -174,7 +174,7 @@ describe('v2.ConfigServiceV2Client', () => {
     });
 
     if (
-      typeof process !== 'undefined' &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       it('throws DeprecationWarning if static servicePath is used', () => {
@@ -210,6 +210,38 @@ describe('v2.ConfigServiceV2Client', () => {
       const servicePath = client.apiEndpoint;
       assert.strictEqual(servicePath, 'logging.example.com');
     });
+
+    if (typeof process === 'object' && 'env' in process) {
+      describe('GOOGLE_CLOUD_UNIVERSE_DOMAIN environment variable', () => {
+        it('sets apiEndpoint from environment variable', () => {
+          const saved = process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = 'example.com';
+          const client = new configservicev2Module.v2.ConfigServiceV2Client();
+          const servicePath = client.apiEndpoint;
+          assert.strictEqual(servicePath, 'logging.example.com');
+          if (saved) {
+            process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = saved;
+          } else {
+            delete process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          }
+        });
+
+        it('value configured in code has priority over environment variable', () => {
+          const saved = process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = 'example.com';
+          const client = new configservicev2Module.v2.ConfigServiceV2Client({
+            universeDomain: 'configured.example.com',
+          });
+          const servicePath = client.apiEndpoint;
+          assert.strictEqual(servicePath, 'logging.configured.example.com');
+          if (saved) {
+            process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = saved;
+          } else {
+            delete process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          }
+        });
+      });
+    }
     it('does not allow setting both universeDomain and universe_domain', () => {
       assert.throws(() => {
         new configservicev2Module.v2.ConfigServiceV2Client({
diff --git a/test/gapic_logging_service_v2_v2.ts b/test/gapic_logging_service_v2_v2.ts
index 9d7246e8..ba8b6519 100644
--- a/test/gapic_logging_service_v2_v2.ts
+++ b/test/gapic_logging_service_v2_v2.ts
@@ -156,7 +156,7 @@ describe('v2.LoggingServiceV2Client', () => {
     });
 
     if (
-      typeof process !== 'undefined' &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       it('throws DeprecationWarning if static servicePath is used', () => {
@@ -192,6 +192,38 @@ describe('v2.LoggingServiceV2Client', () => {
       const servicePath = client.apiEndpoint;
       assert.strictEqual(servicePath, 'logging.example.com');
     });
+
+    if (typeof process === 'object' && 'env' in process) {
+      describe('GOOGLE_CLOUD_UNIVERSE_DOMAIN environment variable', () => {
+        it('sets apiEndpoint from environment variable', () => {
+          const saved = process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = 'example.com';
+          const client = new loggingservicev2Module.v2.LoggingServiceV2Client();
+          const servicePath = client.apiEndpoint;
+          assert.strictEqual(servicePath, 'logging.example.com');
+          if (saved) {
+            process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = saved;
+          } else {
+            delete process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          }
+        });
+
+        it('value configured in code has priority over environment variable', () => {
+          const saved = process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = 'example.com';
+          const client = new loggingservicev2Module.v2.LoggingServiceV2Client({
+            universeDomain: 'configured.example.com',
+          });
+          const servicePath = client.apiEndpoint;
+          assert.strictEqual(servicePath, 'logging.configured.example.com');
+          if (saved) {
+            process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = saved;
+          } else {
+            delete process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          }
+        });
+      });
+    }
     it('does not allow setting both universeDomain and universe_domain', () => {
       assert.throws(() => {
         new loggingservicev2Module.v2.LoggingServiceV2Client({
diff --git a/test/gapic_metrics_service_v2_v2.ts b/test/gapic_metrics_service_v2_v2.ts
index 4124f150..cc9eba4c 100644
--- a/test/gapic_metrics_service_v2_v2.ts
+++ b/test/gapic_metrics_service_v2_v2.ts
@@ -142,7 +142,7 @@ describe('v2.MetricsServiceV2Client', () => {
     });
 
     if (
-      typeof process !== 'undefined' &&
+      typeof process === 'object' &&
       typeof process.emitWarning === 'function'
     ) {
       it('throws DeprecationWarning if static servicePath is used', () => {
@@ -178,6 +178,38 @@ describe('v2.MetricsServiceV2Client', () => {
       const servicePath = client.apiEndpoint;
       assert.strictEqual(servicePath, 'logging.example.com');
     });
+
+    if (typeof process === 'object' && 'env' in process) {
+      describe('GOOGLE_CLOUD_UNIVERSE_DOMAIN environment variable', () => {
+        it('sets apiEndpoint from environment variable', () => {
+          const saved = process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = 'example.com';
+          const client = new metricsservicev2Module.v2.MetricsServiceV2Client();
+          const servicePath = client.apiEndpoint;
+          assert.strictEqual(servicePath, 'logging.example.com');
+          if (saved) {
+            process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = saved;
+          } else {
+            delete process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          }
+        });
+
+        it('value configured in code has priority over environment variable', () => {
+          const saved = process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = 'example.com';
+          const client = new metricsservicev2Module.v2.MetricsServiceV2Client({
+            universeDomain: 'configured.example.com',
+          });
+          const servicePath = client.apiEndpoint;
+          assert.strictEqual(servicePath, 'logging.configured.example.com');
+          if (saved) {
+            process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'] = saved;
+          } else {
+            delete process.env['GOOGLE_CLOUD_UNIVERSE_DOMAIN'];
+          }
+        });
+      });
+    }
     it('does not allow setting both universeDomain and universe_domain', () => {
       assert.throws(() => {
         new metricsservicev2Module.v2.MetricsServiceV2Client({