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Filtronics System Solves Water Quality Issues at Bridge City Texas

Cutline 1: Mike Lund of the City of Bridge City water department monitors a control panel for the Filtronics, Inc., water filter system at the city’s Rachal Street well.

Cutline 2: A 3,000-gallon tank of filter media was installed at each of Bridge City’s three water wells as part of a $1.4 million system installed by Filtronics, Inc.

Cutline 3: Bridge City has implemented a new $1.4 million water filtration system designed to eliminate iron and manganese deposits that have resulted in cloudy tap water for many of the city’s residents.

By Dave Rogers

For The Record

Jerry Jones played it cool Tuesday when asked if he felt a sense of relief to finally have Bridge City’s $1.4 million water filtration system up and running.

“This is just another project,” the longtime city manager said.

Technically, turning on the sand filters at the city’s two operating wells last weekend only kicked off a 120-day pilot project, after which the city will need another OK from the Texas Commission on Environmental Quality to be 100 percent in the clear.

But Jones leaves little doubt he believes the iron and manganese buildups that have caused the cloudy and brown water for some Bridge City water customers for several years will soon be a thing of the past.

“This will be the end,” he said.

The system, bought from the California-based Filtronics, Inc., is going through break-in cycles, which mean the filters at the two wells are being backwashed more than normal for the next few days.

A 3,000-gallon tank of filter media was installed at each of Bridge City’s three water wells as part of a $1.4 million system installed by Filtronics, Inc.

“We’re testing them daily, and the state will come in and test it every week,” said Mike Lund, water department foreman for Bridge City.

“The state does not require that [daily testing] but with them being in the break-in period, we want to keep an eye on all that,” Jones said.

Lund said the tests for the new wells show that iron and manganese levels “are non-detectable coming out.”

“That tells us the filters are doing what they were designed to do,” Jones said. “They’re removing all the iron and manganese.”

The city has been serving its 3,800 water customers with just two of its three wells since last July, when the state

determined the city violated the maximum contaminant level for total trihalomethanes, a byproduct of the chlorine used to disinfect water.

Jones said it was discovered that the problem was caused by leaky casing in a single well that was immediately taken off line.

Repair work is complete on the repair of the “Romero” well, Jones said.

“When we got permission to start up those wells, the third well was not included because we were re-lining the well,” he said.

Bridge City has implemented a new $1.4 million water filtration system designed to eliminate iron and manganese deposits that have resulted in cloudy tap water for many of the city’s residents.

“But that’s all been done. It’s where we can put it back on-line, but we have to call TCEQ back out here and get them to OK that site.”

Jones cautioned that the city must flush its lines of all iron and manganese buildups before sounding the “all clear” on its water.

“It’s certainly good to get them on-line and get the iron and manganese removed. But we’re only at the starting point,” the city manager said.

“Now comes the task of removing all the iron and manganese from the lines that have accumulated over the last 25 to 30 years.”

The job of flushing the lines will cause cloudy water, but the city is enlisting the help of the fire department and plans to work at night to lessen the impact.

“When we do the flush process, we’ll do it a section of town at a time, and we’ll do it at night within the next couple of weeks,” he said.

“We’ll do it until we get it [iron and manganese] all out.”

The city manager is optimistic – and realistic.

“Hopefully, it’ll all go pretty quickly,” he said. “But if we say that, it’ll take four months.”

Original article:



NXT-2 is highly stable and extends bed volumes.

NXT-2 is a patented media which provides users with the lowest treatment costs per thousand gallons for adsorption technology. This is due to the high surface area of the media, which is often times greater than 250 m2/gram.  High surface area increases the medias capacity for arsenic adsorption and extends bed volumes.

In addition to the high surface area, NXT-2 is stable. Once the arsenic is bound to the media, NXT-2 will not release the bound arsenic in the event of pH upset. Release or “spiking” occurs when the pH of the water exceeds the zeta point pH of the media. NXT-2 has a high zeta point pH of 9.5 while many iron based medias have a zeta point of 7.8 pH. This stability reduces the potential to distribute water which has high arsenic concentrations  in excess of the EPA standard, due to loss of pH control.

For your smaller arsenic removal projects, NXT-2 is a cost-effective solution over other leading adsorptive media.

Learn more by downloading our technical bulletin here:

Arsenic Basic Process Assessment Guide

The concentraion of Iron in source water can be one of the main drivers in technology selection, therefore the presnece of iron will play a prominent role in technology selection and the treatability of a given water source.  The most effective arsenic removal processes available are iron-based treatment technologies such as chemical coagulation/filtration with iron salts and adsorptive media with iron-based products.  These methods are particularly effective in removing arsenic because iron has a strong affinity to adsorb arsenic.  Because of the unique role iron plays in facilitating arsenic removal, the level of iron in the source water is a primary consideration in the selection of an optimal treatment approach.

Arsenic to Iron ratio chart

The above chart shows a detailed description of the range of iron concentrations relative to arsenic concentrations and how the Fe:As ration could influence the treatment technology chosen.

  • HIGH iron levels (>0.3 mg/L).  HIGH Fe:As ratio (>20:1)
    Iron removal processes can be used to promote arsenic removal from drinking water via adsorption and co-precipitation.  Source waters with this ratio are potential candidates for arsenic removal by iron removal.  (A)
  • MODERATE iron levels (>0.3 mg/L). LOW Fe:As ratio (<20:1)
    If the iron to arsenic ratio in the source water is less than 20:1, then a modified treatment process such as coagulation/filtration with the addition of iron salts should be considered. (B)
  • LOW iron levels (<0.3 mg/L).
    Technologies such as adsorptive media, coagulation/filtration, and ion exchange are best suited for sites with relatively low iron levels in their source waters at less than 300 ug/L, the secondary MCL for iron. (C)

This process selection is very basic and the removal capacities depicted are meant to be a general rule of thumb.  It is important to run a General Mineral Analysis on your water to determine the best treatment approach.

Filtronics is excited to announce TD Rooke as new Canadian Representative

Filtronics Inc., a leading municipal and industrial water treatment solutions company, is delighted to have TD Rooke Associates, Ltd. as one of their new sales representatives. TD Rooke Associates, Ltd. recently joined The Filtronics representative team and is managing the Provence of Ontario, Canada.

Stephen Smee, Vice President of operations for Filtronics says, “TD Rooke Associates, values customer support which aligns perfectly with Filtronics Inc., core beliefs. We are very happy to have them working with us to create a strong representative team in the Canadian industrial and municipal market.”

TD Rooke Associates, Ltd. is one of the leading sales representatives in Canada. They provide quality engineered products to the industry that offer excellent value to the customer by providing prompt, knowledgeable, and reliable support. They are constantly expanding through the introduction of innovative concepts and products.

Filtronics is widely known as a technological leader in the municipal and industrial water treatment industry throughout the United States, Canada and Mexico. They have a comprehensive line of products featuring their ElectromediaÒ and EnvirowashÒ backwash reclaim systems.  Filtronics is also a supplier of NXT-2 media, and GE Water & Process Technologies Reverse Osmosis Water Treatment Systems. Filtronics focus has always been to give their customers the best service possible. For more information on Filtronics and their extensive water treatment solutions please visit or call (714) 630-5040.


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