According to our data, the average electricity rate in Nassau is 16. New York deregulated its electricity market in 1996, giving all residential and commercial customers the power to choose their electricity supplier. 22¢ per kWh — that's lower than the New York state average of 22. The best. Consumer electricity prices: historical data, charts, comparisons, and downloadable datasets. Residents may be able to switch providers to find a lower rate. Updated to ensure that fuel costs are distributed more fairly across varying usage levels. Why is BPL's tariff being adjusted? What is.