How Seasonal or Multi-Year Variation Shows in the Record
No Direct Tannin Monitoring in Glendale's Water System
The Glendale City public water system draws from surface water sources. According to EPA records, there are no federal monitoring data available for tannins in this system. This means no official measurement tracks tannin levels over seasons or years here. Surface waters are generally where tannins, natural organic compounds from vegetation, might appear, but Glendale's records do not include this data.
Other Water Quality Measures Are Monitored Consistently
While tannins are unmonitored, Glendale’s water system is routinely tested for multiple constituents, including lead and several treatment process codes recorded by the EPA. No health-based violations have been found in these parameters, showing consistent regulatory compliance.
What Questions a Commercial or Industrial Operator Adds That a Household Does Not
Commercial Users May Need Detailed Organic Compound Profiles
Businesses relying on water for manufacturing or processing might seek extensive organic content analyses, including tannins, to prevent equipment staining or water quality interference. They typically perform detailed laboratory investigations beyond municipal reports.
Households Focus on Aesthetic Effects and Simple Testing
Residential concerns tend to center on visible water color or taste changes. Because tannins can cause tea-colored water, homeowners often look for signs like discoloration in laundry or fixtures rather than complex analytical data.
A Worked Example: Reading the Record's Median and Range as a Homeowner Would
Use Surface Water Source Information as Context
Knowing Glendale’s water comes from surface water helps set expectations. Tannins naturally occur in such water but are not automatically present at problematic levels.
Rely on Your Own Water Testing to Confirm Tannin Presence
Since the system’s record lacks tannin data, the best step is to arrange for an independent certified laboratory test specifically for tannins or total organic content. This will confirm if tannins are a factor in your home.
How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
System Data Reflects Over 63,000 Connections and 234,766 People
The water system serves a large population, drawing from a managed source rather than individual wells. The absence of tannin data means no widespread or standardized sampling for this constituent has taken place.
Limited Data Means Household Testing Is Key
Because federal monitoring does not cover tannins here, household results provide the essential individualized insight for treatment decisions.
Why Aesthetic Secondary Standards Differ from Health-Based Limits, Applied to This Constituent
Tannins Are Typically an Aesthetic Concern
Tannins cause tea-colored water and sometimes staining. They are not regulated as health hazards under EPA rules. Aesthetic secondary standards govern taste, color, and staining potential, which do not indicate safety issues.
Glendale’s Record Shows No Health-Based Violations
The absence of violations means the water meets all health standards, regardless of tannin presence or color effects. Visual or taste changes from tannins are addressed through treatment rather than health regulation.
Final Recommendation: Order a Tannin or Total Organic Content Test
To determine if tannins are impacting your household water, the crucial next step is to have water tested by a certified laboratory for tannins. If tannins are found, the Autotrol Yellow, Tea-Colored Tannin Water Filter system can directly address and reduce these compounds, improving water appearance and usability. This system ships ready to configure for your home water supply.
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 GLENDALE CITY OF (AZ0407093), surface water supply, serving 234766 people: 0 health-based violations of 46 total; lead 90th percentile 0.00155 mg/L
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