Pentek Yellow, Tea-Colored Tannin Water Filter

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Why do aesthetic secondary standards for tannins differ from health-based limits?

Tannins are naturally occurring organic substances that can cause tea-like discoloration in water but are not recognized as health hazards by the EPA. Instead, tannins fall under aesthetic secondary standards, which address water appearance, taste, and staining potential rather than safety. These standards are guidelines and not enforceable limits. In South Burlington’s public water system, no health-based violations are recorded, indicating no safety concerns with water quality. However, aesthetics like discoloration from tannins can affect water use satisfaction.

What does a certified laboratory test report for tannins show and how do I read it?

Laboratory tests for tannins measure their concentration in water, often expressed in milligrams per liter (mg/L) of tannic or humic substances. A test report lists the measured value alongside method detection limits and may compare results to recommended aesthetic guidelines, not health standards. Since federal data for tannins is not collected in South Burlington’s public water system, homeowners need independent testing of their own water supply to determine tannin levels and whether treatment is advisable.

How can I interpret South Burlington's water system records on tannins as a homeowner?

The South Burlington City Water System draws from surface water sources, which are more prone to containing tannins than groundwater due to natural organic matter from surrounding soil and vegetation. Although no official tannin monitoring data exists for this system, the surface water origin suggests tannins could be present in some households. Without direct measurement of your water, regional data does not confirm tannin presence or concentration in your home. Testing your water independently is the only way to know.

What do seasonal or multi-year variations in tannin levels look like and are they documented here?

Because no federal or state monitoring data for tannins exists for South Burlington’s water supply, there is no public record of seasonal or long-term changes in tannin concentrations. Generally, surface water sources may show higher tannin levels in periods of heavy rainfall or leaf fall due to increased runoff and organic matter. Homeowners should consider periodic testing to identify any fluctuations impacting water quality in their household.

What does the absence of measured tannin range mean compared to federal standards?

The lack of tannin measurements in South Burlington’s water system record means there is no federally reported range to compare against secondary standards. Such standards focus on aesthetics and staining potential, not safety. The absence of data does not indicate safe or unsafe conditions regarding tannins. Instead, individual water testing is necessary to determine if tannins are present at levels warranting treatment.

How do tannins enter water sources and the distribution system in South Burlington?

In South Burlington, the public water supply comes from surface water sources, where tannins can enter naturally from decaying vegetation and organic soils surrounding rivers, lakes, or reservoirs. These compounds impart a yellow to tea-like color when present. While the municipal system maintains compliance with health-based regulations, tannins may persist through treatment and enter home plumbing. This occurs through natural organic matter rather than contamination events.

What should I NOT conclude from regional data about tannins in my home water?

You should not assume that the absence of tannin data in South Burlington public water system records means your home water is free of tannins. Likewise, you should not infer any health risk or safety issue from regional data. The only reliable way to determine tannin presence and concentration in your water is through a certified laboratory test of your household supply. If tannins are present and cause discoloration or staining, the Pentek Yellow, Tea-Colored Tannin Water Filter ships ready to configure for direct purchase and can reduce these aesthetic concerns effectively.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2027-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA SDWIS record for SOUTH BURLINGTON CITY WATER SYSTEM (VT0005091), surface water supply, serving 19500 people: 0 health-based violations of 2 total; lead 90th percentile 0 mg/L