Which rate structure charges the same rate per unit regardless of consumption?

• A. Decreasing Block Rate
• B. Seasonal Rate
• C. Uniform Rate
• D. Increasing Block Rate

Answer: (C)

Rate structures in water billing determine how the price per unit changes with usage. The option that charges the same price per unit no matter how much you use is a uniform rate. With a uniform rate, every unit costs the same, so your bill is simply the per-unit price multiplied by the total volume, making costs predictable for any level of consumption. The other patterns adjust the unit price as you use more: a decreasing block rate lowers the unit price as you consume more, an increasing block rate raises the unit price with higher usage, and a seasonal rate changes the price depending on the time of year rather than the amount used.