
Hidden Leaks in Pipes from Street to House Pollute Waterways By Anne-Marie Lambert Belmont has greatly accelerated investigating underground sources of water pollution in the last six months. This good news is tempered by the knowledge that we have 77 miles of sewer pipes and 56 miles of stormwater drains, all old. The average sewer pipe in Belmont is now 83 years old. The average storm drain is 64 years old. Our accountants assume a 60-year useful life for underground pipes. Figure 1 shows how we got here. Until 1900, Belmont was a farming community served by about 30 miles [READ MORE]