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RO Membrane Selection for Donna, TX Water
City of Donna
PWS ID: TX1080002
2025 water quality report
What's in Donna's Water
Reported values from City of Donna's 2025 water quality data. Feed water chemistry drives membrane choice, operating pressure, and cleaning frequency.
Source water
Rio Grande surface water delivered via the Donna Irrigation District #1 canal
Barium0.104 ppm
Beta emitters4.8 pCi/L
Chloramines3.7 ppm
Chloramines (range)2.0-5.0 ppm
Combined radium1.5 pCi/L
Copper 90th0.14 ppm
Dibromochloromethane20.1 ppb
Fluoride0.39 ppm
HAA533 ppb
Lead 90th1.56 ppb
Lithium38.5 ppb
Nickel0.0024 ppm
Nitrate0.22 ppm
Pfhxa0.004 ppb
Pfpea0.0068 ppb
Toc12.4 ppm
TTHM50 ppb
TTHM (range)30.6-63.4 ppb
Our Recommendation for Donna
Donna's disinfection-byproduct load climbed in 2025 - TTHM now runs to a 50 ppb locational average with individual samples as high as 63 ppb (still under the 80 MCL) - on top of the PFAS (PFHxA, PFPeA) and lithium the UCMR5 round detected in the finished water. RO is one of the few point-of-use technologies proven against both PFAS and trihalomethanes, and the brackish NanoH2O (formerly LG) BW 400 R G2 handles the Rio Grande mineral base at the same time.
Membranes Matched to This Water
Running RO on Donna water?
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Data Source
Water quality values on this page are taken from City of Donna's 2025 published water quality report (PWS ID TX1080002). 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