Perchlorate in Kennebec County: Evaluating Residential Water after Equipment Failure

According to EPA records for the Augusta Water District, which supplies water to Augusta, Chelsea, Manchester, Vassalboro, Winthrop, and other parts of Kennebec County, perchlorate was not detected above the reporting level of 4.0 micrograms per liter in 12 samples taken between 2002 and 2003. This data reflects the water system as a whole and is not specific to any individual home's water.

If You Notice Effects on Specific Water Fixtures or Appliances

Perchlorate, when present, primarily affects water used for drinking and cooking rather than household appliances like washing machines or dishwashers. However, if your perchlorate treatment system has failed, you may want to focus attention on fixtures that provide water for ingestion such as kitchen sinks and refrigerators with water dispensers. This is because perchlorate can interfere with thyroid function if it accumulates at significant levels over time, which is why managing its presence in your drinking water is important.

If You Are Trying to Understand the Monitoring Data Yourself

The EPA monitoring data for this region showed zero detections above 4.0 µg/L, meaning perchlorate was either not found or was below the instrument’s minimum reporting threshold in those tests. This does not guarantee zero perchlorate in your specific water but indicates that the regional groundwater source monitored by the Augusta Water District has not shown measurable levels above the reporting level during that survey period.

If You Leave Perchlorate Unaddressed Over Time After Your Treatment System Fails

Without treatment, perchlorate can persist in groundwater since it does not degrade easily. Long-term exposure to perchlorate at elevated levels can potentially affect thyroid hormone production, but the EPA has not set a maximum contaminant level for perchlorate in drinking water as of the survey dates. However, following loss of your existing treatment, periodic testing can help monitor if perchlorate concentrations increase in your specific water supply.

If You Consider Aesthetic Secondary Standards Versus Health-Based Limits for Perchlorate

Unlike contaminants such as chloride or total dissolved solids, perchlorate is not primarily an aesthetic issue. It does not affect taste, odor, or staining but is monitored for potential health concerns related to thyroid function. The EPA’s data shows no health-based violations in this system, so aesthetic standards do not apply in this context for perchlorate.

If You Wonder How Perchlorate Differs From More Common Water Issues in Kennebec County

Perchlorate is chemically distinct from other common water problems like iron or hardness. Unlike those, which often cause visible effects such as staining or scaling, perchlorate’s presence is only detectable through lab testing and is managed primarily because of its potential impact on hormone regulation rather than water appearance or equipment performance.

If Your Household Is Larger, or You Have a Second or Seasonal Home in the Area

Larger households or multiple residences may require more careful water management plans, since water use patterns and exposure risks differ. Seasonal homes may experience changed water chemistry due to inactivity or different groundwater levels. Testing each location's water individually is important because the EPA record covers the whole system, not individual sources or times of year.

This summary reflects the EPA's monitoring of the Augusta Water District’s water system serving parts of Kennebec County, ME, between 2001 and 2005. For the most updated and location-specific information, reviewing government sources and testing your household water is recommended. The Autotrol Perchlorate Filter is a direct-purchase option designed to reduce perchlorate in home water supplies when treatment equipment fails or requires replacement.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2003-04-17. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR1 monitoring (2001-2005) for AUGUSTA WATER DISTRICT (ME0090080), ME: 12 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level