A laboratory test report for tannins typically lists concentrations in water samples as either detected or non-detected, sometimes with median values or ranges if multiple samples exist. For Ada County residents served by VEOLIA WATER IDAHO's public water system, it is important to understand what existing government data reveals and what it does not regarding tannins in their water.
What 'Detected', 'Median' and 'Range' Mean in the Sampling Record on This Page
In this public water system record, no federal or EPA monitoring data exist for tannins. That means there are no reported detections, medians, or ranges for tannins in the municipal supply serving Ada County. It does not imply that tannins are absent from all water sources, only that tannins have not been measured or reported in this system's routine monitoring. ‘‘Detected’’ means an analytical instrument found some presence in a sample; ‘‘median’’ is the middle value among all samples; ‘‘range’’ shows the lowest to highest found. Without data, these terms cannot apply to tannins here.
What Distinguishes This Problem from the Two Problems Most Often Confused with It
Tannins are organic compounds that can cause tea-colored discoloration in water, often confused with rust or iron staining, and sometimes mistaken for other organic matter. Unlike rust, tannins do not come from metal corrosion but from decaying vegetation, especially in surface water sources. Since VEOLIA WATER IDAHO uses surface water, tannins could be present, but their presence and concentration require specific testing, separate from iron or manganese tests typically conducted.
Which Fixtures, Appliances or Processes Are Affected First and Why
If tannins are present at noticeable levels, staining may appear first on toilets, sinks, or bathtubs as a yellow, brown, or reddish hue. Water-using appliances such as washing machines may show discoloration on laundry. These aesthetic impacts do not reflect a health threat but can affect laundry color and surface appearance. Because tannins are dissolved organics, they do not clog plumbing but can impair water appearance and taste.
The Role of Plumbing Material and Age, Separate from the Source Water
Plumbing materials like PVC, copper, or galvanized steel do not produce tannins; tannins originate from source water organic content. However, older plumbing may show other discolorations or deposits that can be mistaken for tannins. Evaluating water quality issues in the home requires distinguishing between discoloration from tannins in the supply and issues arising from pipe material, age, or biofilm buildup inside plumbing.
What the Measured Range Means Against the Relevant Federal Standard, and What It Does Not Mean
No tannin levels are recorded for this system, and no federal health-based violation exists. The EPA secondary standard for tannins relates to aesthetics only — affecting taste, odor, and staining — not health safety. Therefore, any measured tannin levels below or above aesthetic guidelines do not indicate water safety concerns. Confirming precise tannin levels requires individual well or household water testing beyond public system monitoring.
Because tannins commonly arise in surface water sources like those supplying Ada County, specific household testing is recommended if discoloration or staining is noticed. The Autotrol Yellow, Tea-Colored Tannin Water Filter is designed to address tannin discoloration effectively. This system ships ready to configure and uses technology suitable for reducing tannins that cause tea-colored water.
To summarize, this water system's government record shows no tannin data reported. The source water being surface water can be associated with tannins, but only a home-level test can establish presence and concentration. The documented solution named here provides a targeted approach for treating tannins if testing confirms their impact on household water.
For full details, see the official EPA SDWIS public water system record for VEOLIA WATER IDAHO (ID4010016) serving Ada County.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2026-06-30. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for VEOLIA WATER IDAHO (ID4010016), surface water supply, serving 264978 people: 0 health-based violations of 62 total; lead 90th percentile 0.002 mg/L
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