The public water system serving Cleveland County is sourced from surface water, according to the EPA's records for the Norman Utilities Authority (OK1020801). This system serves over 100,000 people through more than 42,000 connections. While two health-based violations are noted in the record, none pertain directly to the presence of tannins, and no official monitoring data for tannins in this water system exist.
If you want to know how treated water differs at the tap with a tannin water filter
Water treated by a Fleck Yellow, Tea-Colored Tannin Water Filter modifies the appearance of tannin-stained water commonly associated with surface water supplies. This technology is designed specifically to reduce tannins, organic compounds that create a yellow to tea-like coloration in water but are not tracked in government sampling. Once treated, water typically shows clearer color, which many households find improves overall water aesthetics and reduces staining on fixtures.
If you observe yellow or tea-colored staining or discoloration in your household water
Such staining often points to tannins or related organic material from surface water. However, not all discoloration is caused by tannins; some may arise from other sources. The presence of tannins can be confirmed only through specific testing of your own water sample at a certified laboratory. Symptoms such as unusual taste or odor are less likely caused by tannins, which primarily affect water color and staining properties.
If you want to understand the influence of plumbing materials and their age separate from the source water
The color and staining seen in household water from tannins are not directly caused by plumbing materials. Older pipes and fixtures may accumulate deposits or contribute to discoloration through corrosion or mineral interactions but do not produce tannin coloration. Distinguishing between discoloration from tannins and from plumbing requires testing and inspection specific to your home’s system.
If you wonder what 'detected,' 'median,' and 'range' mean in the Cleveland County water record
The EPA water system record presents a summary of results from treated water samples representative of the public system’s distribution network. 'Detected' means the constituent was measured by instruments during sampling but does not imply a problem on its own. 'Median' and 'range' indicate typical concentrations and the span of results across samples, helping to characterize the general water quality. These terms apply to regulated contaminants and are not present for tannins, which are not routinely monitored by the system.
If you are a commercial or industrial operator considering tannin treatment
Commercial and industrial water users may face additional scrutiny regarding tannins due to specific process requirements or regulatory standards. For these operators, understanding tannin concentrations and potential impacts on equipment or product quality is essential. Testing must include tannin quantification, and treatment solutions should be selected based on the volume and quality needs of the operation, potentially requiring consultation beyond residential treatment options.
What you should NOT conclude from Cleveland County area data
The absence of tannin monitoring data for the public water system means no definitive statements can be made about the presence or concentration of tannins in your household water. Government records reflect area-wide samples, not individual wells or taps. To know your home's specific condition, you must arrange testing for tannins. Similarly, the detection or absence of other constituents in the area does not confirm the presence or absence of tannins. Deciding between treatment technologies relies on your water’s tested composition and your household’s aesthetic preferences.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for NORMAN UTILITIES AUTHORITY (OK1020801), surface water supply, serving 104868 people: 2 health-based violations of 9 total; lead 90th percentile 0.00055 mg/L
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