Show All Answers
Since 1995, when MMWD changed the distribution system disinfectant from chlorine to chloramine, a combination of chlorine and ammonia, MMWD has achieved a 57% reduction in THMs on average. The federal standard for THMs is 80 micrograms per liter (ug/L,) or parts per billion, while the THM count in MMWD's water averages 31 ug/L.
While HAA monitoring was not required before the conversion to chloramine, it has been well documented that the use of chloramine for a residual disinfectant significantly reduces the formation of HAAs. The average concentration found in MMWD’s distribution system is approximately one-third of the federal standard of 60 ug/L.
On its way to your tap the water temperature can increase and pressure is reduced as water enters distribution system tanks and ultimately flows with the released air bubbles out of your tap. There is no health impact associated with the air bubbles, but if you find the cloudiness unappealing, let the water sit for a few minutes or keep a container of water stored in the refrigerator.
The algal type is called Aphanizomenon or Aphan for short. Its presence does not degrade the safety of our water supply in any way and, unlike some types of algae, it does not produce any musty or moldy tastes or smells. While many algae types grow predominantly in the summer months, this type of algal sheen can be seen in nearly all months of the year.