diff --git a/src/Log/Level.php b/src/Log/Level.php
index 0dda093..d3f6944 100644
--- a/src/Log/Level.php
+++ b/src/Log/Level.php
@@ -63,4 +63,15 @@ public function jsonSerialize(): int
     {
         return $this->value;
     }
+
+    /**
+     * @inheritDoc
+     */
+    public function isError(): bool
+    {
+        return $this === Level::EMERGENCY
+            || $this === Level::ALERT
+            || $this === Level::CRITICAL
+            || $this === Level::ERROR;
+    }
 }
diff --git a/src/Log/LevelInterface.php b/src/Log/LevelInterface.php
index 8df993b..99bd14c 100644
--- a/src/Log/LevelInterface.php
+++ b/src/Log/LevelInterface.php
@@ -21,4 +21,11 @@ public function asString(): string;
      * @return int
      */
     public function asInt(): int;
-}
\ No newline at end of file
+
+    /**
+     * Returns true if the log level should be considered an error level.
+     *
+     * @return bool
+     */
+    public function isError(): bool;
+}