DDW-2024-008008

Instructions for Fluoride MCL NoticeBTier 2
Template on Reverse

Since exceeding the fluoride maximum contaminant level (MCL) is a Tier 2 violation, you must provide public notice to persons served as soon as practical but within 30 days after you
learn of the violation (141.203(b)). You must issue a repeat notice every three months for as long as the violation persists. If you exceed the secondary maximum contaminant level of
2 milligrams per liter but not the MCL of 4 milligrams per liter, you must issue a special notice with different health effects language. Use the Fluoride SMCL – Tier 3 template for
the correct information.

Community systems must use one of the following methods (R309-220-6(3)):

Hand or direct delivery
Mail, as a separate notice or included with the bill

Non-community systems must use one of the following methods (R309-220-6(3)):
Posting in conspicuous locations
Hand delivery
Mail

In addition, both community and non-community systems must use another method reasonably calculated to reach others if they would not be reached by the first method (R309-220-6(3)).
Such methods could include newspapers, e-mail, or delivery to community organizations. If you mail, post, or hand deliver, print your notice on letterhead, if available.

The notice on the reverse is appropriate for hand delivery or mail. However, you may wish to modify it before using it for posting. If you do, you must still include all the required
elements and you may not modify the mandatory health effects language (R309-220-8(4)).

Corrective Action

In your notice, describe corrective actions you are taking. Do not use overly technical terminology when describing treatment methods. Listed below are some steps commonly taken by water
systems with fluoride violations. Use one or more of the following actions, if appropriate, or develop your own:

We are working with [local/state agency] to evaluate the water supply and researching options to correct the problem. These options may include treating the water to remove fluoride
or connecting to [system]=s water supply.
We have stopped using the contaminated well. We have increased pumping from other wells, and we are investigating drilling a new well.
We will increase the frequency at which we test the water for fluoride.
We have since taken samples at this location and had them tested. They show that we meet the standards.

Repeat Notices

If this is an ongoing violation and/or you fluctuate above and below the MCL, it is a good idea to give the history behind the violation. You should list the date of the initial detection,
as well as how levels have changed over time. If levels are changing as a result of treatment you should indicate that fact.

After Issuing the Notice

Make sure to send the Division of Drinking Water a copy of each type of notice and a certification that you have met all public notification requirements within ten days after issuing
the notice (R309-105-16(3)):

IMPORTANT INFORMATION ABOUT YOUR DRINKING WATER
[System] Has Levels of Fluoride Above Drinking Water Standards

Our water system recently violated a drinking water standard. Although this is not an emergency, as our customers, you have a right to know what happened, what you should do, and what
we are doing to correct this situation.

We routinely monitor for the presence of drinking water contaminants. Testing results we received on [date] show that our system exceeds the standard, or maximum contaminant level (MCL),
for fluoride. The average level of fluoride in samples taken during the last year was [level and units]. The standard for fluoride is that the average of samples taken over the last
year may not exceed [MCL].

What should I do?

Children under the age of nine should use an alternative source of water that is low in fluoride. In addition, you may want to consult your dentist about whether to avoid dental products
containing fluoride. Adults and children over age nine should consult their dentist or doctor and show him/her this notice to determine if an alternate source of water low in fluoride
should be used.

What does this mean?

This is not an emergency. If it had been, you would have been notified immediately. Fluoride in small amounts helps prevent tooth decay. However, some people who drink water containing
fluoride in excess of the MCL over many years could get bone disease, including pain and tenderness of the bones. Fluoride in drinking water at half the MCL or greater may cause mottling
of children=s teeth, usually in children less than nine years old. Mottling, also known as dental fluorosis, may include brown staining and/or pitting of the permanent teeth. This problem
occurs only in developing teeth, before they erupt from the gums. Although it takes many years of exposure to fluoride for bone disease to develop, mottling can occur after a relatively
short period of exposure.

What happened? What is being done?

Fluoride contamination is rarely due to human activity. Fluoride occurs naturally in some areas and is found in high concentrations in our source water. [Describe corrective action.]
We anticipate resolving the problem within [estimated time frame].

For more information, please contact [name of contact] at [phone number] or [mailing address].

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.

This notice is being sent to you by [system]. Water System ID#: ___________. Date distributed: