1-3. A residential development of 280 houses is being planned. Assume that the American Water Works Association average daily household consumption applies, and that each house has three residents. Estimate the

additional average daily water production in L/d that will have to be supplied by the city. ▼ Answer 1-4. 3.70 x 105 L/d Repeat Problem 1-3 for 320 houses, but assume that low-flush valves reduce water consumption by 14 percent.