If you're just trying to get utility prices (rates), that info will be public record due to rate tariffs and utility commissions. It can get fairly complex quickly since there are more and more choices for rate plans these days and even the simple tiered-baseline rates differ across baseline territories within a given utility.
If you're trying to get consumption data, I doubt you will get enough for a meaningful sample. In addition, the data doesn't mean a lot without household demographics and attributes...square footage, climate, heating type (elec/gas), A/C, presence of a pool or spa, # of residents, etc.
Anyway, if it's just utility prices / rates you need, I would just go ahead and get that from public record. On top of an average rate residential customers pay, you could do some analysis around tier 1 rate differences as well as top tier.
Man, from seeing the other posts, SCE&G is raping us here in Columbia, SC. Last month, our power bill was $225. 20 of that was gas, the other was electricity. I've got a brick veneer house about 1900 sq ft running a heat pump.
Water seems to be consistantly around $65/month for two baths plus dishwasher and washing machine. Of course we have two kids, so we wash a crapload of clothes each week.
I'll let ya know next bill I get. Water is paid by the landlord though, dunno what it would be. Power is usually 60-80 in the summer. Around 700 sqft. Type of HVAC would matter as well I think. Heat pump here. Plus look at rental vs home owner, we have different rates here since renters are more likely to leave an unpaid bill.
The utility rates per Kilowatt Hour at our beach house will give you a high end. The island generates its own electricity from 5 diesel 2000KW generators. Currently, the yearly average is $.45 a Kilowatt Hour when the average nationwide should be around 9 cents a Kwh. The town is Block Island, Rhode Island 02807.