INVESTIGATION: A WESLACO HOMEOWNER, A SMELL FROM HIS TAP, AND A STICKY NOTE THAT DOES NOT ADD UP
- Joshua Moroles
- May 6
- 8 min read
This story starts with a smell.
Andrés Alvarez lives in an 8 year old home in Weslaco. He noticed something off about his tap water. A smell that should not be there. So he did what most people do not bother to do. He pulled out his TDS meter. He filled a Pyrex measuring cup from his tap. He stuck the probe in.
The reading came back at 1,310 microsiemens.
For context, the chart printed right on the side of his meter shows 1,000 as the line marked "U.S. EPA's max contaminant level." His tap water blew past that line. He compared it to bottled water just to make sure his meter was working. The bottled water read normal. His tap water did not.
So he called the City of Weslaco.
A NOTE BEFORE WE GO ANY FURTHER
I am not telling you the water in Weslaco is dangerous. I have not tested it. No one has, in any meaningful way, including the company that just claimed they did.
What I am telling you is that the response Andrés Alvarez received from the City of Weslaco and from Inframark, the private contractor that runs the city's water system, is not credible.
The numbers they handed back to him cannot be what they claim to be. That is a different problem than contamination. It is a problem of accountability. And it is the one this story is about.
RED FLAG NUMBER ONE
The City did not send anyone out. The City told him to call the treatment company. Weslaco does not directly operate its own water treatment plant. It contracts that out to Inframark, a private company headquartered in Katy, Texas. Inframark has run the Weslaco water treatment plant, both wastewater plants, and all 51 lift stations since October 2015. That is more than ten years.
When the City "connected" Andrés to Inframark, the call did not go to a customer service line. It did not go to a control room. It did not go to a public works dispatcher. It went to somebody's personal cell phone.
The man on the other end answered like he had just woken up. "Uhm, hello?"
That is the response a Weslaco resident gets when they report that their drinking water is not safe.
RED FLAG NUMBER TWO
Someone from Inframark eventually came to the house. They took a sample. They told Andrés the water was fine. They told him his TDS was low.
His meter said 1,310. They said low.
Then they sent him their results. Not a laboratory report. Not a document on company letterhead. Not a TCEQ accredited lab analysis with a chain of custody, a sample ID, an analyst signature, or an accreditation number.
A pink sticky note. Written in marker.
I am looking at the photo of that sticky note right now. Here is what it says.
NTU 0.201 Total chlorine 0.6 Free chlorine 0.03 Monochloramine 0.46 Ammonia free 0.27 Chloride 144 Conductivity 55.9 TDS 26.2 Salinity 0.02 pH 6.92 Temperature 27.0°C
That is the entire "test result" a customer of a public water system received from the company contracted to deliver his drinking water.
RED FLAG NUMBER THREE
The numbers on that sticky note are not internally consistent. They cannot all be true at the same time.
Total dissolved solids is the sum of every dissolved substance in the water. Every mineral. Every salt. Every dissolved metal. Including chloride. Chloride is a component of TDS. By the most basic rule of measurement, the part cannot be larger than the whole.
The sticky note says chloride is 144 milligrams per liter. The same sticky note says TDS is 26.2 milligrams per liter.
That is impossible.
You cannot have 144 milligrams of chloride dissolved in water that supposedly contains only 26.2 milligrams of dissolved solids total. The chloride alone would have to be more than five times the size of the total it is part of. It is the same as a grocery receipt that says one item costs $144 and the total bill is $26.
It does not matter how the sample was taken. It does not matter who took it. The numbers as written are not physically possible. They describe a substance that cannot exist.
RED FLAG NUMBER FOUR
Then there is the conductivity gap.
Andrés measured 1,310 microsiemens at his tap. The sticky note says 55.9. Same units. Same water. Allegedly.
A conductivity reading of 55.9 µS per centimeter is the kind of number you get from reverse osmosis output. It is the kind of number you get from a Watermill Express jug. It is the kind of number you get from a lab grade purified water bottle. It is not a number you get from a Weslaco tap.
The Weslaco Water Treatment Plant pulls raw water from the Rio Grande. That water travels through irrigation canals before it reaches the plant. Rio Grande water carries significant dissolved minerals, naturally elevated chloride, and rising salinity from decades of upstream agricultural and urban use. Treated municipal tap water in the Lower Rio Grande Valley typically tests somewhere between 400 and 800 ppm TDS. Sometimes higher.
The City of Weslaco does not run reverse osmosis on its municipal supply. There is no scenario in which water leaving a residential tap in Weslaco reads 26.2 ppm TDS naturally.
So either Inframark did not actually test the water that came out of Andrés Alvarez's faucet, or the numbers on that sticky note do not describe the water they were supposed to describe. There is no third option.
RED FLAG NUMBER FIVE
Now look at the chlorine numbers.
Total chlorine 0.6 mg/L. That is the disinfectant residual that protects water as it travels through pipes from the treatment plant to the tap. Texas Administrative Code Title 30, Chapter 290, sets the legal minimum for chloraminated systems like Weslaco's at 0.5 mg/L total chlorine, both at the entry to the distribution system and throughout it.
The reading on the sticky note is 0.6.
That is one tenth of a milligram above the legal minimum. That is not a comfortable margin. That is a system running right at the edge of the rule.
And here is what makes that number worth paying attention to. TCEQ identifies low chloramine residuals as the leading cause of something called nitrification. Nitrification is what happens when ammonia in a chloraminated system gets converted by bacteria into nitrite and then nitrate. It causes disinfectant residuals to drop further. It causes the chemistry to spiral. And it produces taste and odor issues.
It produces smells. The kind of smells homeowners report.
TCEQ specifically warns that nitrification gets worse "when temperatures are warm and water usage is low." That describes summer in the Rio Grande Valley. That describes newer subdivisions in Weslaco where homes are spread out and water sits longer in the pipes before it reaches the tap.
I am not diagnosing what is happening in Andrés Alvarez's water. I am pointing out that the conditions he is describing match a known failure mode that TCEQ specifically warns chloraminated systems about. And the disinfectant level his contractor measured was sitting one tenth of a milligram above the floor.
RED FLAG NUMBER SIX
This is not the first time.
In April 2023, KRGV reported on a 37 year Weslaco resident named Eduardo Mejia. He told the news his tap water carried a "horrendous stench" that smelled like sewer. He said it filled his shower. He said it filled his sink. The City flushed hydrants. Twice. The smell got worse. The City told him his neighbors had not reported issues.
In November 2024, the North Weslaco Wastewater Treatment Plant began producing an odor that spread across multiple neighborhoods. The Mayor confirmed it. He said the basin had been drained for pipe replacement. He said the project would take 25 to 45 days.
In May 2026, Andrés Alvarez is reporting a smell from his tap. Different home. Different street. Same city. Same operator.
That is at least three documented complaint events in three years involving water smell or tap water quality concerns in Weslaco. Each one was treated as an isolated incident. None of them have been treated as a pattern.
RED FLAG NUMBER SEVEN
The pH on the sticky note reads 6.92. That is technically inside the EPA secondary range of 6.5 to 8.5. But it is on the acidic end. Slightly acidic water is more corrosive. It eats at copper pipes. It eats at galvanized fittings. It picks up metals between the meter and the faucet.
In an 8 year old house, that does not mean disaster. But it means the water arriving at the meter is already pushing toward the corrosive side. And whatever happens between the meter and the kitchen sink is on the homeowner.
WHAT IS ACTUALLY GOING ON
I cannot tell you with certainty what is in Andrés Alvarez's tap water right now. Neither can the sticky note. Because the sticky note describes a sample that, by the math written on it, is not a real sample of anything.
What I can tell you is this. A homeowner reported a problem. The City handed him off. The contractor who got handed the call answered from a cell phone. The contractor showed up.
The contractor sent back a hand written note. The hand written note contains numbers that violate the basic rules of measurement. The disinfectant level was sitting one tenth of a milligram above the legal floor. And the homeowner was told everything was fine.
Inframark has been running this system for more than a decade. Inframark's own published case study about Weslaco brags about cost effective changes and capital improvements.
The Mayor and council have publicly praised the contract. The company calls itself a "reliable provider."
A reliable provider does not respond to a customer concern with a sticky note that fails a 6th grade chemistry check.
This is what regulatory capture looks like at the local level. Not corruption in a conference room. A cell phone that sounds half asleep. A pink note instead of a lab report. A homeowner with a working meter being told to trust the company over his own eyes.
WHAT YOU CAN DO IF YOU LIVE IN WESLACO
If your water smells. If your water tastes off. If your water has color. Document it. Take a photo. Note the date and the time. Run the tap for one minute and test again. If you have a TDS meter, take a reading. If you do not have one, they cost about $15.
Report it to the City of Weslaco at 956 968 3181. Get a complaint number. Write it down. If you get handed off to Inframark, ask for the call to be logged in writing.
If you get a sticky note back, take a picture of it.
This story is not over. This is the opening.
SOURCES AND METHODOLOGY
The chloride versus TDS impossibility in this report is a chemistry argument, not an opinion. Chloride is a component of total dissolved solids by definition. A reported chloride value cannot exceed a reported TDS value taken from the same sample.
The conductivity to TDS conversion of 1,310 µS to roughly 655 ppm TDS uses the standard 0.5 conversion factor that ships as the default on most consumer meters, including HM Digital pen meters of the type Andrés used.
The U.S. EPA secondary drinking water standard for total dissolved solids is 500 mg/L, established under 40 CFR Part 143 as a non health based palatability and aesthetic standard.
The TCEQ minimum residual disinfectant requirement of 0.5 mg/L total chlorine for chloraminated systems comes from Texas Administrative Code Title 30, Chapter 290, Sections 290.110 and 290.104. It applies both at the entry to the distribution system and throughout it.
The TCEQ guidance identifying low chloramine residuals as a primary driver of nitrification, and identifying warm temperatures and low water usage as aggravating conditions, comes from the agency's published guidance on Controlling Nitrification in Public Water Systems with Chloramines.
Inframark's contract details with the City of Weslaco, including the start date of October 2015, the 19.1 million gallon per day water plant capacity, the operation of two wastewater treatment plants, and the 51 lift stations, are confirmed through Inframark's own published case study on the Weslaco contract.
The April 2023 Eduardo Mejia tap water smell complaint and the November 2024 North Weslaco Wastewater Treatment Plant odor incident are confirmed through KRGV news reporting.
All quotes attributed to Andrés Alvarez in this story were provided directly by him, with permission, in a Facebook Messenger conversation. He authorized the use of his name in this reporting. The photographs of his TDS meter, the Inframark sticky note, and the meter's reference chart were also provided by him.
I have not contacted Inframark or the City of Weslaco for comment on this initial report.
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