Arlington Water Quality Startsat Two City Treatment Plants

Arlington treats its own regional raw water

Arlington receives raw surface water through the Tarrant Regional Water District system. The city identifies Cedar Creek Reservoir, Richland-Chambers Reservoir, Lake Arlington and Lake Benbrook within its source-water portfolio. Arlington then treats the water at its own facilities rather than purchasing all finished water from a neighboring city.

The treatment process described in Arlington’s 2025 Water Quality Report includes:

• ozone as a primary disinfectant;
• alum and polymer for coagulation;
• clarification and sediment removal;
• granular activated carbon filtration;
• final chloramine disinfection before storage and distribution.

That process gives Arlington a genuinely different treatment story from nearby wholesale customers that receive finished Fort Worth or TRA water.

Municipal granular activated carbon is also not the same as a permanent residential carbon system. At the plant, carbon operates within a large, carefully controlled treatment train. At a home, carbon performance depends on the media installed, the amount of usable bed volume and the water flow through it.

Arlington publishes a moderate hardness range

The 2025 report lists total hardness averaging approximately 94 mg/L as calcium carbonate, with results from about 80.4 to 110 mg/L.

That equals an average near 5.5 grains per gallon, with a reported range of approximately 4.7 to 6.4 gpg.

This is milder than the upper-end hardness reported in Rockwall, Little Elm or Richardson. It is not zero-hardness water. At Arlington’s reported levels, homeowners can still notice spotting on glass and fixtures, mineral deposits around aerators, reduced soap efficiency, scale inside water-heating equipment, and a desire for softer-feeling laundry and bathing water.

The published range also argues against oversized softeners programmed from generic North Texas assumptions.

Arlington’s local DBP results were comparatively low

Arlington’s 2025 report listed:

• average TTHM: approximately 11.5 ppb, with results from 10.5 to 12.6 ppb;
• average HAA5: approximately 7.8 ppb, with results from 7.1 to 8.4 ppb;
• average chloramine residual: approximately 3.7 ppm, with results from 3.4 to 3.8 ppm.

The federal group limits are 80 ppb for TTHM and 60 ppb for HAA5. Arlington’s reported DBP results were well below those enforceable limits.

This is not a reason to pretend that filtration has no value. It changes the emphasis. For Arlington, the strongest whole-home rationale is not an alarming municipal violation story. It is a persistent chloramine residual near the upper end of the permitted disinfectant range, personal preference regarding taste and odor, additional reduction of detectable organic treatment byproducts, and refinement beyond the public-system baseline.

EWG applies much lower independent benchmarks to several individual DBPs. Those values are not federal limits and should not be presented as proof that Arlington failed its obligations.

The city’s testing volume is part of the local story

Arlington’s laboratory reported collecting more than 7,400 samples and performing more than 17,000 analyses during the reporting year. That level of municipal testing deserves to be acknowledged rather than dismissed.

It also demonstrates the boundary of a city report: Arlington can monitor the public system extensively, but it cannot describe every water heater, fixture, recirculation loop, service line or existing filter after the meter. Residential treatment is not a substitute for municipal testing. It is a separate layer designed around one property.

Arlington treatment roles

1. Scale Protection via Water Fixers Clarion Elite™

Clarion Elite addresses Arlington’s calcium and magnesium hardness. Because the official range is approximately 4.7–6.4 gpg, correct sizing may be more modest than systems marketed for much harder North Texas water. Resin quantity, reserve capacity and salt dose should match the current result and household consumption.

2. Whole-Home Filtration via Water Fixers Carbonyx Elite™

Carbon Elite addresses Arlington’s chloramine residual, taste, odor and appropriate organic-compound or DBP goals. An average residual around 3.7 ppm makes catalytic media selection and contact time central to the design. The fact that Arlington already uses carbon at the treatment plant does not make residential carbon redundant; it simply means the municipal and residential stages serve different purposes at different scales.

3. Kitchen Purifier via Water Fixers ClaRO™

ClaRO provides a separate drinking and cooking water barrier. It is the more targeted stage where the household wants lower TDS, broader dissolved-contaminant reduction or a consistent drinking-water profile independent of normal distribution changes.

No generic fear around Arlington's iron or sediment

Arlington’s normal carbon-filtered municipal supply is treated surface water. Water Fixers Ferrion is appropriate only where iron is confirmed. Water Fixers TurbiClear is appropriate only where suspended particulate is documented at a meaningful loading rate. Neither product should be added merely to make the system sound more comprehensive.