Lead Awareness

EPA Regulation Changes

On October 8th, the Biden-Harris Administration and the EPA issued a final rule requiring drinking water systems across the country to identify and replace lead pipes within 10 years. The Lead and Copper Rule Improvements (LCRI) also require more rigorous testing of drinking water and a lower threshold requiring communities to take action to protect people from lead exposure in water.

The City of Wyoming Water Works will be distributing letters to homeowners who either have lead pipes, galvanized pipes, or the status of their service line is unknown (Status unknown means that Wyoming Water Works does not have the records that indicate the status of their line). Please view the map below to see the status of your Service Line.

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2. Search your address in the top right hand corner

Action Steps

Per USEPA requirements, utilities such as Wyoming Water Works began testing for lead when the 1991 Lead and Copper Rule was passed.

Wyoming Water Works has routinely tested for lead in drinking water since then. Every three years, Wyoming samples drinking water from at least 20 representative homes in Wyoming (which have lead service line materials). Our water has performed well on these tests. The EPA limit for lead in drinking water of 15 ppb is being reduced to 10 ppb in 2027. Below are our results from the last 20 years:


2004	<5 ppb (parts per billion)
2007	<5 ppb
2010	<5 ppb
2013	2 ppb
2016	<5 ppb
2019	<5 ppb
*New technology was introduced for more precise readings
2022	<0.6 ppb
2025	.54 ppb

Wyoming's Lead Protocol

Wyoming Water Works’ water treatment plant is a lime softening plant that utilizes ground water as its source. Wyoming conducts multiple corrosion control tests to verify that the water mains are not corroding. In fact, Wyoming immobilizes lead by depositing a calcium scale on water pipes. This scale is verified during water main breaks and service line replacement work.
There are a couple of conditions that may cause an increase in lead exposure:
1. Disturbance of a water service line can cause a temporary lead increase.
2. Stagnant water can lead to higher lead levels. Wyoming’s EPA approved lead tests require 6 hours of non-water use. Results show that lead levels do not increase appreciably overnight during this low usage period. It is good, however, to flush your faucets after you return from vacations or other low flow periods.

If you have questions or concerns please reach out to the Water Works Department at 513-821-8044.