States/NN

Sewer overflows in NN

Sewer overflow record — reported spills, the worst utilities, and how often overflows reached waterways in NN.

Reported events
46
Total volume
159.4M gal
Reached waterways
0(0%)
Latest event
Jun 14, 2026

Worst utilities in NN

Ranked by number of reported overflow events.

#UtilityEventsVolumeReached water
1WINDOW ROCK Collection System1818.8M gal0
2KAYENTA Collection System1392.6M gal0
3TUBA CITY Collection System747.1M gal0
4TWIN ARROWS WWTP Collection System455K gal0
5SHIPROCK Collection System3906K gal0
6CHINLE Collection System15K gal0

Biggest spills in NN

The largest single reported overflow events.