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RO Membrane Selection for La Feria, TX Water

City of La Feria
PWS ID: TX0310003
2025 water quality report

What's in La Feria's Water

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

Source water

Surface water and ground water from the La Feria Irrigation District, Cameron County (Rio Grande system)

TTHM note

highest locational running annual average; second site 52; individual samples 26.6-59.8

Arsenic2 ppb
Barium0.109 ppm
Beta emitters4.7 pCi/L
Chloramines2.1 ppm
Combined radium1.5 pCi/L
Copper 90th0.075 ppm
Dibromochloromethane37 µg/L
Fluoride0.44 ppm
HAA527 ppb
Lead 90th1.6 ppb
Nickel0.0028 ppm
Nitrate0.17 ppm
Selenium3.9 ppb
TTHM68 ppb

Our Recommendation for La Feria

La Feria's disinfection byproducts are trending up — the worst-site TTHM running average hit 68 ppb in 2025 (individual samples to 59.8), up from 45 the year before, against a federal limit of 80. Dibromochloromethane reached 37 µg/L. This is the removal case RO plus carbon handles cleanly; the brackish NanoH2O (formerly LG) BW 400 R G2 covers the Rio Grande mineral base at the same time.

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 La Feria water?

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Data Source

Water quality values on this page are taken from City of La Feria's 2025 published water quality report (PWS ID TX0310003). 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