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RO Membrane Selection for Midland, TX Water

City of Midland Utilities (Water Purification Plant)
PWS ID: TX1650001
2024 water quality report

What's in Midland's Water

Reported values from City of Midland Utilities (Water Purification Plant)'s 2024 water quality data. Feed water chemistry drives membrane choice, operating pressure, and cleaning frequency.

Source water

Purchased surface water from the Colorado River Municipal Water District (Lower Colorado River — O.H. Ivie, E.V. Spence and Lake J.B. Thomas reservoirs) plus area well fields (Paul Davis; T-Bar sources)

Arsenic note

highest-detected 9 vs range top 8.03 as printed (source inconsistency)

Pfhxs note

average printed 0.091 vs range 0.0072-0.0115 ppb — internally inconsistent as published; at either reading PFHxS approaches or exceeds the 10 ppt federal MCL within its range

TTHM note

highest single-location yearly average printed exactly at the 80 MCL; individual samples reached 114

Arsenic9 ppb
Arsenic (range)2.1-8.03 ppb
Barium0.18 ppm
Beta emitters12.6 pCi/L
Chloramines2.71 ppm
Chloramines (range)0.02-11.4 ppm
Chromium1.8 ppb
Combined radium1.5 pCi/L
Copper 90th0.2611 ppm
Cyanide146 ppb
Di 2 ethylhexyl phthalate0.6 ppb
Fluoride0.4 ppm
HAA527 ppb
HAA5 (range)1-35.2 ppb
Lead 90th1.5 ppb
Lithium50.7 ppb
Lithium (range)48.0-52.4 ppb
Nitrate1 ppm
Nitrate (range)0.773-1.22 ppm
Pfba0.015 ppb
Pfba (range)0.009-0.0378 ppb
Pfbs0.0042 ppb
Pfhxa0.001 ppb
Pfhxs0.091 ppb
Pfhxs (range)0.0072-0.0115 ppb
Selenium10 ppb
TTHM80 ppb
TTHM (range)1.29-114 ppb
Uranium1.4 µg/L

Our Recommendation for Midland

Midland is the hardest-working water in the Permian: the worst-site TTHM yearly average printed EXACTLY at the 80 ppb federal limit with individual samples reaching 114, arsenic to 9 ppb, cyanide 146 vs a 200 MCL, lithium above 50 ppb, and PFHxS readings that reach the not-yet-enforceable 10 ppt federal PFAS MCL. The report also discloses a November 2024 turbidity treatment-technique violation. Oilfield-country water this loaded is precisely what brackish RO exists for — a NanoH2O (formerly LG) BW 400 R G2 with antiscalant strips the DBPs, arsenic, and PFAS in one membrane pass.

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 Midland water?

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Data Source

Water quality values on this page are taken from City of Midland Utilities (Water Purification Plant)'s 2024 published water quality report (PWS ID TX1650001). 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