I've tried to find more than the scores listed for example on the EPA website, and have not been able to find anything specific to individual vehicles. The scores don't tell the whole story, because the above mentioned vehicles all achieve the score of 9 out of 10, but that represents a range of possible values

And lo and behold, I just found another EPA site that lists different values than the values I referenced above from another site of the same agency!!!???

Here's the new site:
http://www.epa.gov/greenvehicles/index.htm

This latest site seems more up to date, and has these scores (for CA only):
Prius 9.5 APS and 10.0 GGR
Toyota Camry 4 cyl 9.5 APS and 7.0 GGR
Honda Accord 9.5 APS and 7.0 GGR
Honda Accord hybrid 7.0 APS and 8.0 GGR
HCH APS 3 or 9.5, GGR 10
Honda Civic CNG APS 9.5 GGR 9.0
Insight CVT: APS 9.0, GGR 10.0
Insight manual APS 3.0 GGR 10.0

The APS of 9 has these g/mile limits:
NOx 0.02, NMOG 0.01, CO 2.1, PM, 0.01 and HCHO 0.004
APS 10 is zero across the board.

what gets me, that on this site too, the ratings for the Prius (and others) differ substantially between CA and the rest of the US. If this is true, it ticks me off, why should we not be able to get the same low polluting technology in the rest of the US?
For example, the Prius in the rest is listed as
8 APS (instead of 9.5).

Hhhmmm