Tannins in Androscoggin County Water: What Auburn Residents Should Know

The Auburn Water District, serving 17,245 people in Androscoggin County through surface water sources, has a public record documenting occasional health-based concerns unrelated to tannins. No government monitoring data exists for tannins in this system or elsewhere federally. This means no official measurements are available about tannins in Auburn's municipal water supply.

Which fixtures, appliances or processes are affected first and why?

Tannins, if present in water, can cause tea-colored staining and discoloration. This typically appears first on bathroom fixtures, kitchen sinks, toilets, and laundry appliances due to the tannins' natural organic compounds binding with surfaces. Water used for drinking and cooking may also display a slight yellow tint. These impacts arise because tannins are water-soluble and tend to react with metals and fabrics, leading to visible stains especially noticeable on light-colored surfaces.

What questions does a commercial or industrial operator add that a household does not?

Commercial or industrial water users must consider tannins' effects on operational efficiency and equipment longevity. Questions often include:

• How do tannins interfere with manufacturing processes or chemical reactions?
• What are the consequences for boilers, cooling systems, or irrigation?
• Are there additional monitoring and reporting requirements for tannins at scale?
• How will tannins affect wastewater treatment and disposal compliance?

Residential users generally focus on staining and taste rather than these broader concerns.

What does the measured range mean against the relevant federal standard, and what does it not mean?

Since no federal monitoring data exists for tannins in Auburn’s water, no measured ranges or federal thresholds apply here. Tannins are not regulated as a health contaminant but instead are classified under aesthetic factors. This means their presence, if any, is not considered a safety issue but may affect water appearance and staining tendencies. Residents should not interpret absence of data as confirmation of zero tannins, nor assume any discoloration necessarily indicates excess tannins without professional water testing.

What changes for a large household, a second home, or a seasonal property?

For larger households or multiple-residence properties, tannin effects can be more pronounced due to the volume of water usage and potential stagnation during unoccupied periods. Seasonal homes may experience increased tannin staining after periods of low water flow or inactivity, as organic materials accumulate. Testing water quality before prolonged absences and upon return helps manage these impacts. Usage patterns may influence stain buildup and require attention to treatment frequency or filtration capacity.

What is the role of plumbing material and age, separate from the source water?

Plumbing materials and their age significantly affect tannin visibility and water discoloration. Older pipes or fixtures made from certain metals can interact with organic compounds, potentially intensifying staining or color changes. Corrosion or mineral deposits also influence water clarity independently. Thus, water discoloration in Auburn homes may partially stem from in-house plumbing conditions rather than the water source alone. Testing both water and plumbing materials can help isolate this factor.

What should you NOT conclude from area data?

Area-wide data about Auburn’s water does not provide specific tannin levels in any individual household's water supply. The absence of tannin monitoring in government datasets means you cannot assume tannins are absent or present without proper testing. Also, no detected tannin level equates to a health safety issue, nor does it confirm any violation or treatment failure. To understand your home's water quality concerning tannins, professional laboratory analysis targeting these organic compounds is necessary.

For addressing tannin-related water discoloration and staining, the Pentair Yellow, Tea-Colored Tannin Water Filter ships ready to configure. This proven technology targets tannins specifically, improving water clarity and appearance for households experiencing tannin issues.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2023-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA SDWIS record for AUBURN WATER DISTRICT (ME0090070), surface water supply, serving 17245 people: 2 health-based violations of 4 total; lead 90th percentile 0.0062 mg/L