Frequently Asked Questions

Sometimes described as earthy or organic, foul odors at treatment plants typically come from the decomposition of organic compounds. A natural by-product is hydrogen sulfide (H2S), which can give off the smell of rotten eggs.

The array of technologies available to help control odors has advanced significantly over the past few decades and NTMWD invests to minimize impact to our neighbors. We evaluate the potential odor sources and select technologies that provide efficient, reliable service for the application. Solutions include preventing release of odor from the wastewater into the air (liquid phase treatment) and collection and treatment of odorous air (vapor phase treatment).

Not all odors are the same and can vary in intensity. Some are faint, while others are much more pungent. Weather conditions can intensify odors and things like temperature, wind speed and direction can determine how far the odor drifts. Odors are typically worse at higher temperatures.

Even when odors are strongest, the air's circulation significantly reduces the concentration to levels far below any that could be harmful by the time the smell is noticeable.

Contact NTMWD at 469-626-4900 for odor complaints so they may be investigated. This phone number is always staffed.