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RO Membrane Selection for McAllen, TX Water

McAllen Public Utility (MPU)
PWS ID: TX1080006
2025 water quality report

What's in McAllen's Water

Reported values from McAllen Public Utility (MPU)'s 2025 water quality data. Feed water chemistry drives membrane choice, operating pressure, and cleaning frequency.

Source water

Surface water from the Rio Grande River via Falcon and Amistad Dam releases, stored in the North Water Plant and Boeye reservoirs

Treatment

Chlorine dioxide primary disinfection; chloramines secondary; conventional flocculation/sedimentation/filtration

Arsenic3.5 ppb
Arsenic (range)2.0-3.5 ppb
Barium0.105 ppm
Chloramines3.15 ppm
Chlorite0.85 ppm
Cyanide120 ppb
Fluoride0.47 ppm
HAA524.9 ppb
Lithium45 µg/L
TTHM81.7 ppb

Our Recommendation for McAllen

McAllen's Rio Grande supply runs hard and heavy in the organic matter behind its disinfection byproducts (THMs at 81.7 ppb — that's the fouling load, not something the membrane removes). A brackish NanoH2O (formerly LG) BW 400 R G2 fits: rated 99.8% salt rejection, fouling-resistant, and NSF/ANSI 61-certified for drinking water. Organic pretreatment and antiscalant do the heavy lifting.

Membranes Matched to This Water

The Industry Workhorse

NanoH2O (LG) BW 400 R G2

  • 99.8% salt rejection
  • 11,500 GPD · 225 psi
  • 400 ft² active area
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Running RO on McAllen water?

Send us your system size and feed water details — we'll spec the right membrane for your operation and quote same-day shipping.

Data Source

Water quality values on this page are taken from McAllen Public Utility (MPU)'s 2025 published water quality report (PWS ID TX1080006). Values are utility-wide averages; water at a specific site can vary. For membrane selection on a critical system, test your actual feed water.

View the official report