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RO Membrane Selection for Pharr, TX Water

City of Pharr
PWS ID: TX1080009
2025 water quality report

What's in Pharr's Water

Reported values from City of Pharr's 2025 water quality data. Feed water chemistry drives membrane choice, operating pressure, and cleaning frequency.

Source water

Surface water and groundwater from the Rio Grande River, Hidalgo County (via Hidalgo County Irrigation District #2)

Antimony1 ppb
Barium0.109 ppm
Beta emitters6.1 pCi/L
Chloramines3.25 ppm
Combined radium1.5 pCi/L
Cyanide70 ppb
Dibromochloromethane14.7 ppb
Fluoride0.4 ppm
HAA521 ppb
Lithium52.9 µg/L
Nickel0.0037 ppm
Nitrate0.48 ppm
Pfba0.0112 ppb
Selenium3.7 ppb
TTHM33 ppb
TTHM (range)24-33 ppb
Uranium3.4 µg/L

Our Recommendation for Pharr

A blend of Rio Grande surface and groundwater - brackish and organic-heavy (TTHM to a 33 ppb locational average). A brackish NanoH2O (formerly LG) BW 400 R G2 fits; where energy cost matters, the BW 400 ES L holds rejection at lower pressure. The groundwater share is worth an arsenic-speciation check before finalizing pretreatment.

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
View membrane

Energy Optimized

NanoH2O (LG) BW 400 ES L

  • 99.6% salt rejection
  • 10,500 GPD · 150 psi
  • 400 ft² active area
View membrane

Running RO on Pharr 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 City of Pharr's 2025 published water quality report (PWS ID TX1080009). 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