High water in the Noatak River causes erosion near the old dump site.

Noatak site experiencing thawing and subsidence.

Ground settling is causing a wide range of impacts in Noatak, including to the water treatment plant. But are there benchmarks to monitor the changes in the water plant?

Low water on the Noatak River may be the reason behind changes in the water quality in community wells. The water quality began to change in the plant as measured (eventually) by the need for twice as much chlorine and Naclo polymer in order to get an acceptable residual of chlorine. The change indicates that the well recharge had been depleted and the that wells began operating on stored water in the aquifer. This water would have been older, likely anaerobic and higher in organics and in inorganics such as iron and manganese.

The ground under the new road is developing a sink hole and affecting the foundation of the adjacent house.

Extremely high water on the Noatak