diff -r 33ca961b0870 indra/newview/app_settings/settings.xml
--- a/indra/newview/app_settings/settings.xml	Tue Apr 05 07:23:43 2011 -0400
+++ b/indra/newview/app_settings/settings.xml	Wed Apr 06 14:53:43 2011 -0700
@@ -11926,6 +11926,33 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+    <key>WaterFogColor</key>
+    <map>
+      <key>Comment</key>
+      <string>Water fog color</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Color4</string>
+      <key>Value</key>
+      <array>
+        <real>0.0863</real>
+        <real>0.168</real>
+        <real>0.212</real>
+        <real>0</real>
+      </array>
+    </map>
+    <key>WaterFogDensity</key>
+    <map>
+      <key>Comment</key>
+      <string>Water fog density</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>F32</string>
+      <key>Value</key>
+      <real>16.0</real>
+    </map>
     <key>WaterGLFogDensityScale</key>
     <map>
       <key>Comment</key>
diff -r 33ca961b0870 indra/newview/llwaterparammanager.h
--- a/indra/newview/llwaterparammanager.h	Tue Apr 05 07:23:43 2011 -0400
+++ b/indra/newview/llwaterparammanager.h	Wed Apr 06 14:53:43 2011 -0700
@@ -284,6 +284,9 @@
 	// singleton pattern implementation
 	static LLWaterParamManager * instance();
 
+private:
+	void initOverrides();
+	
 public:
 
 	LLWaterParamSet mCurParams;
@@ -314,6 +317,9 @@
 	LLVector4 mWaterPlane;
 	F32 mWaterFogKS;
 
+	LLColor4 mPrevFogColor;
+	F32      mPrevFogDensity;
+
 	// our parameter manager singleton instance
 	static LLWaterParamManager * sInstance;
 };
diff -r 33ca961b0870 indra/newview/llwaterparammanager.cpp
--- a/indra/newview/llwaterparammanager.cpp	Tue Apr 05 07:23:43 2011 -0400
+++ b/indra/newview/llwaterparammanager.cpp	Wed Apr 06 14:53:43 2011 -0700
@@ -72,6 +72,8 @@
 	mWave1Dir(.5f, .5f, "wave1Dir"),
 	mWave2Dir(.5f, .5f, "wave2Dir"),
 	mDensitySliderValue(1.0f),
+	mPrevFogDensity(16.0f), // 2^4
+	mPrevFogColor(22.f/255.f, 43.f/255.f, 54.f/255.f, 0.0f),
 	mWaterFogKS(1.0f)
 {
 }
@@ -265,6 +267,20 @@
 	// update the shaders and the menu
 	propagateParameters();
 	
+	// If water fog color has been changed, save it.
+	if (mPrevFogColor != mFogColor)
+	{
+		gSavedSettings.setColor4("WaterFogColor", mFogColor);
+		mPrevFogColor = mFogColor;
+	}
+
+	// If water fog density has been changed, save it.
+	if (mPrevFogDensity != mFogDensity)
+	{
+		gSavedSettings.setF32("WaterFogDensity", mFogDensity);
+		mPrevFogDensity = mFogDensity;
+	}
+	
 	// sync menus if they exist
 	LLFloaterWater* waterfloater = LLFloaterReg::findTypedInstance<LLFloaterWater>("env_water");
 	if(waterfloater) 
@@ -449,7 +465,24 @@
 		sInstance->loadAllPresets(LLStringUtil::null);
 
 		sInstance->getParamSet("Default", sInstance->mCurParams);
+		sInstance->initOverrides();
 	}
 
 	return sInstance;
 }
+
+void LLWaterParamManager::initOverrides()
+{
+	// Override fog color from the current preset with the saved setting.
+	LLColor4 fog_color_override = gSavedSettings.getColor4("WaterFogColor");
+	mFogColor = fog_color_override;
+	mPrevFogColor = fog_color_override;
+	mCurParams.set("waterFogColor", fog_color_override);
+
+	// Do the same with fog density.
+	F32 fog_density = gSavedSettings.getF32("WaterFogDensity");
+	mPrevFogDensity = fog_density;
+	mFogDensity = fog_density;
+	mCurParams.set("waterFogDensity", fog_density);
+	setDensitySliderValue(mFogDensity.mExp);
+}