The Norman Utilities Authority in Cleveland County, OK, provides water to over 104,000 people through more than 42,000 connections using surface water as the source. According to EPA public water system records, this system has had two health-based violations on record among nine total. The lead 90th percentile level reported for this system’s distribution—reflecting plumbing and home water rather than source water—was 0.00055 mg/L as of late 2025.
1. How Seasonal or Multi-Year Variation Shows in the Record
The EPA record for the Norman Utilities Authority captures data over years, noting specific sample dates like December 31, 2025, for lead levels. Such records include multiple sampling events spaced out annually or through different seasons, reflecting fluctuations due to changes in source water quality, treatment adjustments, or distribution system dynamics. This variation helps establish a baseline trend rather than a snapshot, allowing for a broader understanding of water characteristics over time in the Cleveland County area.
2. What Distinguishes This Problem from the Two Problems Most Often Confused With It
Whole-home drinking water issues can be confused with localized plumbing problems or with source-water contamination that affects utilities differently. The public water system record specifically addresses the water delivered through the distribution system, not individual household plumbing. This distinction is critical: while lead levels measured reflect water after contact with pipes in the distribution network and homes, source water from surface supplies undergoes treatment to meet federal health standards. Thus, concerns about this problem differ from those related strictly to in-home plumbing or isolated contamination events.
3. What Happens When This Problem Is Left Untreated for Years
Ignoring whole-home drinking water considerations documented by public water system records—such as trace lead presence—may sustain chronic exposure to low-level contaminants present after distribution. Over time, this can contribute to cumulative intake beyond desired thresholds in sensitive populations. Additionally, untreated water issues can affect taste, staining, and overall water quality perception, impacting daily use. While the system reports health-based violations, individual water quality depends on home plumbing condition and personal water testing to confirm water quality at the tap.
4. What the Reader Should Write Down Before Asking Anyone for Treatment Advice
Before seeking solutions, record details from your local public water system report such as the number of health-based violations, the source type (surface water for this system), and specific sampling results like the lead 90th percentile value. Note the date of the latest sampling and the number of customers served. Also, gather any personal water test results from your home, as these are necessary to understand your exact water quality and to identify suitable treatment options.
5. How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
The data for Cleveland County’s public water system comes from numerous samples across many households and distribution points; the lead 90th percentile figure derives from distribution system sampling, which is not a source water measure. The size and frequency of sampling support reliable system-wide estimates but do not reflect every individual connection’s condition. Thus, a small or limited sample from a single home does not provide a definitive picture of the entire system’s water quality, making localized testing essential for personal assessment.
6. What 'Detected', 'Median' and 'Range' Mean in the Sampling Record on This Page
In EPA water system records, 'detected' means a constituent was measurable by instruments but is not necessarily a health concern. 'Median' indicates the middle value from a set of sample results, giving a central tendency, while 'range' represents the spread from lowest to highest values measured. Understanding these terms clarifies that variations in samples are normal and do not automatically indicate unsafe water or violations.
The Norman Utilities Authority’s record analyzed here represents water quality for a large surface-water-based public system in Cleveland County, OK. For detailed water quality data and updates, the EPA’s official public water system website remains the authoritative source.
To address whole-home and drinking water needs based on these records and personal water testing, the Autotrol Whole-Home + Drinking Combo System offers a documented treatment capacity of 32,000 grains and ships ready to configure for residential use.
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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