Any of your suggestions might be correct, depending on context, but 'splash water' is also correct.

http://www.google.com/search?hl=en&ie=ISO-885...

Du hast Recht, Ken.
"Splash water" wird tatsächlich als Substantive in akademische Texte benutzt.

in UK wird auf dem Motorway (equiv. Autobahn)
"SLOW DOWN"
" SPRAY "
auf grossen Tafeln angezeigt wenn das Wasser sprizt,
und das nicht selten :-)

If you google "splash water", you get a bunch of false hits plus some real hits, but only in particularly technical writing and scientific contexts.

Normally, when Germans talk about "Spritzwasser", English native-speakers talk about "splashing", "splashes" and "spray". (Unless water needs to be specified for some particular reason, it is left between the lines.)

Spritzwassergeschutzt = splash-proof

This could work well in some cases.