
This give and take worked fine until recently when nitrate levels up and down the Cape rose. This rise coincided with a marked increase in population: we live in such a desirable location that everyone wanted to join us. What goes into the ground in one yard, inevitably ends up in wells throughout the neighborhood. High nitrates may be due to a neighbor's failing cesspool. Maybe someone put too much fertilizer on a lawn. Or, perhaps the new four-bedroom house across the road played a part. Unfortunately, people = waste = nitrates.
The situation is the worst in the Central District. A report on the situation in 2002 can be found here. A Central District municipal water system is now under construction.
Since Chez Sven is a green bed & breakfast, we may be a little more preoccupied with water quality than at other local establishments. We use Pur filters and bottled water. All bed & breakfasts are supposed to test their water annually. Our spring test results just came back: 4.9 ppm. (The State does not advise drinking water that contains 10 ppm. For the Cape Cod Commission, 5 ppm is the advisable limit.)
Recently I have noticed a sheen to tap water, so I did an experiment.

What can tourists do about the situation? Be aware of the problem and stay informed. Request bottled water in restaurants. Ask whether your hotel or bed & breakfast filters its water and uses biodegradable detergent. And, finally respect Wellfleet’s water resources …