Pentair Yellow, Tea-Colored Tannin Water Filter

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How Tannins Enter Groundwater or the Distribution System in DeKalb and Fulton Counties

Water delivered to homes in DeKalb and Fulton counties, including Atlanta's public water system, primarily comes from surface water sources. Surface water flows through soils and decaying vegetation, which can release organic compounds such as tannins. Tannins are naturally occurring substances that can impart a yellow or tea-like color to water but are not directly monitored in the Atlanta water system's official testing.

While tannins commonly originate from leaves and plant matter in surface waters, these organic compounds are more often encountered in wells influenced by surface water or when leaves and organic debris enter water sources. Without specific monitoring, the presence and concentration of tannins in the household water supply are unknown and must be determined by individual testing.

Comparing DeKalb and Fulton County Water Quality Records With Neighboring Areas Without Overreading

Public water system records for Atlanta, serving more than 1 million people with over 188,000 connections, provide extensive data about many regulated constituents but do not include tannins. This absence is typical since tannins are not a federally regulated parameter. Nearby counties may have similar surface water sources and thus similar potential for tannin presence, but the lack of tannin-specific data means comparisons cannot confirm actual tannin levels or risks.

DeKalb and Fulton counties have experienced five EPA health-based violations among a total of thirteen recorded issues; these do not relate to tannins, and none reflect tannin detection. Therefore, while other water quality factors have been formally addressed, tannin concerns remain unmeasured at the system level.

What 'Detected', 'Median', and 'Range' Mean in This Water System's Sampling Records

The EPA's public water records for the Atlanta system include sampling data for regulated contaminants, but tannins are not among them. Detection means an instrument or test identified the constituent at any concentration, but for tannins, there is no federal dataset including such results from this or any other public water system.

In this context, no median or range values exist for tannins in the municipal water record. A homeowner concerned about tannins must pursue certified laboratory testing of their specific water supply to identify presence and concentration.

What Happens When Tannins Are Left Untreated Over the Years

Tannins can cause water to have a yellow to brown coloration, which may stain fixtures, laundry, or dishes over time. While tannins are not harmful to health and do not violate federal safety standards, their aesthetic effects can be frustrating.

If tannins remain untreated, they can gradually discolor water and potentially alter taste. Persistent tannin presence can also promote organic buildup in plumbing, which some homeowners prefer to avoid for maintenance reasons.

How Seasonal or Multi-Year Variation Appears in Water Quality Records

The Atlanta public water system record contains treatment process codes indicating multiple treatment steps but does not track tannin levels or seasonal variation in organic compounds. Tannin presence in surface waters can fluctuate seasonally with leaf fall and organic matter runoff; such variation is typical in watersheds with natural vegetation.

Without specific tannin monitoring, seasonal or year-to-year changes in tannin levels for this system or area cannot be confirmed through public data. Individual testing over time is necessary to establish any such patterns in household water.

What Homeowners Should Not Conclude From Area Water Quality Data

Residents of DeKalb and Fulton counties should understand that public water system data does not assess tannin concentrations, nor does it indicate tannins are absent or present in their home water. The data available focuses on regulated health-based contaminants, not aesthetic compounds like tannins.

Testing of your individual water is the only way to diagnose tannin presence and severity. If tannins are detected, the Pentair Yellow, Tea-Colored Tannin Water Filter is a documented option designed to address tannin discoloration and improve water appearance. This system ships ready to configure for household use.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2024-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA SDWIS record for ATLANTA (GA1210001), surface water supply, serving 1089893 people: 5 health-based violations of 13 total; lead 90th percentile 0.0014 mg/L