CNN was told by the state that it has been adding HaloSan to the water in Denmark since 2008.
A spokesman for South Carolina’s Department of Health and Environmental Control told CNN in an email that it believed HaloSan was EPA-approved for drinking water based on the way the system was "advertised."
An EPA spokesperson tells CNN that HaloSan is not approved to be used to treat drinking water.
The state Department of Health and Environmental Control says it required daily monitoring, "performed by the certified system operator," of "any chemical" added to the drinking water, ensuring that the maximum dosage is not exceeded.
But, the couple says there have been concerns about skin rashes and kidney problems among residents for years, although a link has not been made directly to the water.
"How can they say it’s good to drink?," Smith told CNN.
South Carolina’s DHEC tested Brown and Smith’s home in 2010, and found about twice the legal level of lead in the water.
But Edwards says he couldn’t let go of a nagging feeling that there was something missing, especially after finding red flags, like a 2010 local newspaper story where a city official declared the water had safe lead levels nine days before the testing was conducted.
Wright, Denmark’s mayor, later told CNN that officials were relying on 3-year-old data when talking to the newspaper because that was what was available at the time.
Drink it.

One in three licensed day cares in Oregon has failed to prove its drinking water is free from high levels of the neurotoxin lead, state data show.
Oregon childcares are required to test drinking water for the first time as part of new rules created in response to reporting last year by The Oregonian/OregonLive.
Of the 2,635 day cares that did submit results, about 1.6 percent discovered lead above state standards, records show.
While the greatest risk comes from lead paint and dust, drinking water can represent 20 percent or more of a person’s total exposure to lead.
"Testing is critical to the safety of children in childcare facilities," Siegel said in a statement.
Mercedes Johnston, director for the day care center, said she shut off access to that tap and provided bottled water until a second round of testing could be completed.
A month later, the facility’s only tap for drinking water tested at 55 parts per billion.
Farr said she’s since provided bottled water to the children in her care, at a cost of about $6 a week.
State regulators have not verified whether children drank from each of the taps at the 43 facilities that reported a high result, the childcare spokesman said.
Officials for the Office of Child Care told The Oregonian/OregonLive last year that lead results would be posted to the state’s childcare website.

CENTRAL KITSAP — A boil-water advisory will be in effect for at least a week for residents of a neighborhood near Wildcat Lake after tests showed E. coli bacteria in the drinking water system.
Kitsap Public Utility District notified about 32 Green Mountain Acres water customers of the contamination Thursday.
"Hopefully we can find something when we get out and inspect the system today," he said.
In the meantime, customers have been advised to boil drinking water for 1 minute to kill any bacteria or use bottled water.
The presence of fecal coliform bacteria, including E. coli, is a sign of contamination from human or animal waste.
Risk of illness from E. coli varies greatly depending on the strain of bacteria — most E. coli strains are harmless, according to the Centers for Disease Control and Prevention.
Young children, the elderly and people with compromised immune systems are most at risk of becoming sick from E. coli.
The state Department of Health, which regulates the Class A water system, and Kitsap Public Health District will assist in examining the system for potential sources of contamination.
Cracked pipes, faulty well cap seals and rodent infestations are among the common culprits.
The Green Mountain Acres water system was transferred to the utility district in 2014 after the previous operator violated state health regulations.

LAHORE – The official agency responsible for supplying quality drinking water to the people of Lahore claims that it is doing well what it is supposed to do.
However, a survey conducted by The Nation in various areas of the metropolis shows no decrease in the use of bottled water in Lahore despite the recent exhortation by Chief Justice of Pakistan Mian Saqib Nisar to people that they use boiled water and give up the expe nsive one being marketed by various companies.
Water and Sanitation Agency has 560 filtration plants in the metropolis from where nine million people take clean drinking water everyday, WASA authorities said.
Another store owner in Garden Town said he did not see any fluctuation in bottled water sales.Sales are as usual, he said.
“A recent test of Wasa’s water carried out on orders of Supreme Court of Pakistan showed that our water was up to the mark.
It’s a tool teams love… monday.com Signup Now Right now, of 12 million population of the city, Wasa has 0.7 million water connections and is collecting revenue from 80,000 meters.
To improve the revenue collection we have introduced Project Blue Drop and have approved the budget in Annual Development Budget ADB 2018-19 at the cost of 3.62 billion,” MD Wasa said.
Project Blue Drop is a five-year project and 2018-19 100,000 consumer connections will be given.
The water filtration plants are equipped with Auto-wash back system and it does not require filters that used to be installed in old filtration plants and required hefty amount of amoney to change those filters.
Instead of starting new schemes, Wasa is focusing on completion of old schemes including a scheme of ‘Improvement of Water Supply System in MA Johar Town & Tajpura Zones of Lahore’ through Zoning/Isolation, Installation of Filtration Plants and 100 Metering (Bulk, Distribution and Consumer Levels), Lahore on which 26 percent work has been completed.

Throughout the water crisis, residents stocked up on water bottles as early and quickly as possible.
Many students had friends or family bring them cases of water after shelves at the local Target and H-E-B went empty.
Students can reduce their environmental footprint and increase their charitable impact through water bottle donations to nonprofits around Austin.
Lorena Ortiz, an environmental science freshman, is one of many students who began drinking bottled water during the crisis.
“I’d be totally fine donating my water, because I’m not going to finish nine cases by the end of the semester.” With the demand for bottled water gone, students such as Ortiz can and should donate their water to local nonprofits who need it.
Places such as the Refugee Services of Texas Austin Service Center, Family Eldercare and Foundation for the Homeless all need water donations delivered at their locations for those in need in Austin.
They can carpool with friends, or even better, UT could create a designated station to deliver extra water cases and expedite the donation process for students.
A drop-off location for water on campus would help students conveniently deliver their water to organizations in need.
The organization has a truck ministry with the St. John Neumann Commissary that uses trucks to deliver meals, water and clothes to Austinites in need.
Instead of drinking all the leftover water, students should consider using refillable water bottles and giving the water to Austinites who don’t have access to clean water.

A boil-water advisory remains in effect Tuesday for customers of the Orange Water and Sewer Authority.
The water utility is awaiting test results to make sure the water isn’t contaminated after a pipe broke Monday morning.
Results from 40 water samples collected throughout the community are expected by Tuesday evening, OWASA officials said in a news release.
The incident began when a water main broke outside the utility’s Jones Ferry Road water treatment plant Monday morning, flooding the street and leaving more than 80,000 customers in Chapel Hill and Carrboro with limited water.
That’s what happened Monday afternoon when a small leak cracked a pipe in Carrboro, temporarily shutting off water to 26 customers, she said.
“Throughout [Monday], our teams were turning off different valves and re-routing water or stopping the flow of water at different sections of the pipe, so they could isolate where along that pipe the water was leaking.” The water main break forced UNC to cancel classes Monday and Tuesday.
Related stories from Raleigh News & Observer UNC-Chapel Hill cancels classes Tuesday because of water main break Eight months after accident, OWASA to resume use of fluoride in water supply OWASA steps up process of flushing out water’s earthy odor, taste OWASA reports to Chapel Hill council, sets Friday board meeting Water ban deals a $471,479 hit to Chapel Hill-Carrboro hotels In February 2017, a break shut off water service to residential and business customers for more than 24 hours.
This year’s budget funds about 60 projects, including $5.5 million for water main upgrades.
Need to know A boil-water advisory is a precautionary step that OWASA is asking customers to take until testing can show tap water has not been contaminated during the water main break.
Use boiled or bottled water to make coffee and ice.

The International Bottled Water Association (IBWA) has launched its own podcast, “H2O In The Know,” as a new way to connect with consumers and ensure they have access to key bottled water facts.
In each episode, the “H2O In The Know” host interviews experts in the bottled water and related industries to discuss a variety of water topics, covering everything from the current science on hydration, how to increase recycling rates, bottled water regulations, health, taste, and more.
“H2O In The Know offers consumers a great new way to learn interesting facts and stories about water, especially bottled water,” says IBWA Vice President of Communications Jill Culora.
“Podcasts have been a growing medium in recent years, and it’s an effective way to connect with people, especially with younger audiences.” The new podcast adds to IBWA’s diverse collection of communication tools used to provide the public with the facts about the bottled water industry.
IBWA has a robust social media presence (e.g., Facebook, Twitter, Instagram, Pinterest), an award-winning industry magazine, and a YouTube channel, which has more than 700,000 views.
H2O In The Know is currently available on iTunes and SoundCloud.
The mission for the show is to share bottled water facts and educate the listening public about all things water, especially bottled water.
For example, during the first episode, “Bottled Water 101,” IBWA answers many of the common questions about bottled water.
The discussion covers bottled water regulations, types of bottled water on the market, differences between bottled water and tap water standards, and packaging options.
Listen to, subscribe, and rate “H2O In the Know” on iTunes and SoundCloud now.

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Yes, ContinueNo Carrboro, N.C. — UNC Medical Center and UNC Health Care clinics were expected to be operating as normal by mid-day Tuesday, a day after a water main break left them and area schools and residents without adequate clean water.
The break in Carrboro Monday morning forced UNC Hospitals to reroute some trauma patients.
We, of course, always encourage wise water use," said Linda Low, OWASA communications and community relations officer.
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Yes, ContinueNo The break early Monday morning on Jones Ferry Road flooded the street and forced Chapel Hill-Carrboro City Schools and the University of North Carolina at Chapel Hill to cancel classes.
By Tuesday morning, OWASA had stopped the leak and was working to repair the pipe, Low said.
UNC classes will resume Wednesday.
"We know that water is essential in all matters of daily life.It was our critical priority to stop the leak and getting the water storage tank levels back up to normal capacity."
The inconvenience was the second in two years for customers of OWASA.

GREENLAND – Bottled water is being provided for drinking and cooking at Breakfast Hill Golf Club after recent tests show the suspected carcinogen 1,4-dioxane is above new state standards.
Water samples taken at the golf club on Oct. 15 tested at .61 parts per billion.
“Based on existing hydrogeologic data and the current conceptual site model for the Coakley Landfill, it is believed that the source of the 1,4-dioxane originates from the landfill,” Hoffman wrote on Nov. 1.
Hoffman explained that the Coakley Landfill Group is required to provide alternative drinking water to the clubhouse.
A private company has been testing water samples at the location for years.
Sewall said the club has an industrial filtration system on site, but it cannot remove 1,4-dioxane from the water.
Sewall said the state has not provided a deadline to remedy the problem, but he expects action to be taken within the next few weeks.
Last month, officials at Coakley Landfill Group were ordered to provide a family at 368 Breakfast Hill Road with bottled water for drinking, cooking and brushing teeth after their home’s water tested at .38 parts per million.
The privately owned landfill accepted municipal and industrial wastes from the Portsmouth area between 1972 and 1982.
Incinerator residue was also accepted for a refuse-to-energy project between 1982 and 1985, according to the United States Environmental Protection Agency.

The current government is asking whether people would like to see the moratorium extended to Jan. 1, 2020.
In fact, I think we know enough to start phasing out permits to take water for bottling now," he said.
Township wants moratorium until 2023 The Township of Centre Wellington has requested the province extend the moratorium until Jan. 1, 2023.
Centre Wellington is home to the Middlebrook well, which was purchased by Nestlé Waters Canada in the summer of 2016.
"I think it’s really important that the government has said they want to protect vital water resources, at the same time be open for business," she said.
"We want to be open for business, that means environmentally sound businesses and we hope that being open for business means allowing municipalities to grow and to prosper and to be able to attract new industries to our community — industries that are not simply extraction.
The Middlebrook well being used as a source for bottled water will not bring employment to the area, she argues.
‘Critical data needed’ Officials at Nestlé Waters Canada say they’re aware of the proposal to extend the moratorium on new and expanded permits for water bottling.
"These are necessary to collect important data that the community, government and industry need to contribute to the overall water resource knowledge of the region and make informed decisions that will ultimately protect our water as the region continues to grow."
The public has until Nov. 29 to take the provincial survey and provide comment on extending the moratorium.