I worked on the lake last year. Yes the speed limit is 25 (I could not bring myself to cite someone for it though, Yes I was that bored deputy once).
The inspection is a joke, they do not have a decibel meter nor does the deputy on the water. The citations that are issued are a civil cite, and not enforced in a court of law, the fines go directly to MWD, and they hear the "Trial" if you dispute. The MTBE rule is unenforcable they do not have the testing equipment. The patrol boat can only travel approximately 28 MPH (radar tested), and can not catch half the boats going faster to issue a cite.
As for the City of Hemet, I believe is suing MWD for failing to complete the several other projects promised by MWD (recreation lake camping etc..).
So the moral is MWD has done whatever they want without checks and balance.
Oh Yeah, Quagga mussel have already been found, they just will not issue a press release on it.....
The deputies out there are very nice and friendly, stop by and say hi if your out there....