Boil Water Notice: April 12, 2026

HCMUD4122026-04-12T19:25:40-05:00April 12th, 2026|

Due to a loss of pressure in the water system which provides our drinking water, the Texas Commission on Environmental Quality has required the Harris County MUD #412, TX1013354, public water system to notify all customers to boil their water prior to consumption (e.g., washing hands/face, brushing teeth, drinking, etc). Children, seniors, and persons with weakened immune systems are particularly vulnerable to harmful bacteria, and all customers should follow these directions).

To ensure destruction of all harmful bacteria and other microbes, water for drinking, cooking, and ice making should be boiled and cooled prior to use for drinking water or human consumption purposes. The water should be brought to a vigorous rolling boil and then boiled for two minutes.

In lieu of boiling, individuals may purchase bottled water or obtain water from some other suitable source for drinking water or human consumption purposes.

When it is no longer necessary to boil the water, the public water system officials will notify customers that the water is safe for drinking water or human consumption purposes.

Once the boil water notice is no longer in effect, the public water system will issue a notice to customers that rescinds the boil water notice in a manner similar to this notice.

Please share this information with all the other people who drink this water, especially those who may not have received this notice directly (for example, people in apartments, nursing homes, schools, and businesses). You can do this by posting this notice in a public place or distributing copies by hand or mail.

If you have questions regarding this matter, you may contact the Operations Company for your District at: (832) 490-1601 or by emailing customercare@sienviro.com.

Boil Water Notice: April 12, 2026 (PDF)

Notification of Disinfectant Change: October 14, 2025 to November 14, 2025

HCMUD4122025-10-08T15:16:39-05:00October 8th, 2025|

Harris County M.U.D. No. 412, (PWS) ID TX1013354 , will temporarily convert the disinfectant used in the distribution system from chloramine to free chlorine. The conversion will begin October 14, 2025, and continue through approximately November 14, 2025, During this period, you may experience taste and odor changes associated with this type of temporary disinfectant conversion. These taste and odor changes are to be expected, however the water will continue to meet or exceed all state and federal drinking water standards and is safe to drink.

Public water systems are required to properly disinfect their water and maintain an adequate disinfectant residual in the distribution system. Chloramine, free chlorine combined with ammonia, is widely used as a disinfectant because it persists for long periods while also limiting the formation of disinfection by-product contaminants. Prolonged use of chloramine coupled with other factors that can impact water quality, such as high temperatures or stagnation of water, may result in the growth and/or persistence of organic matter within the pipes of the distribution system, which may hinder the ability to maintain an adequate disinfectant residual. A temporary conversion to free chlorine, partnered with flushing activities, helps to rid distribution pipes of this organic matter, and improve the quality of your water overall.

Harris County MUD No. 412 has chosen to implement a temporary disinfectant conversion to free chlorine based on the following:

1. Routine Distribution Water Quality Maintenance

Please share this information with all people who drink this water, especially those who may not have received this notice directly (i.e., people in apartments, nursing homes, schools, and businesses). You can do this by posting this notice in a public place or distributing copies by hand or mail.

If you have questions regarding this matter, you may contact Si Environmental LLC at (832) 490-1600.