Understanding Algal Toxins in Berks County Water Systems

Residents in Berks County receive water from the Shillington Municipal Authority, which uses surface water sources to supply approximately 13,300 people through 5,697 connections. This system's water quality has been monitored for algal toxins as part of EPA's Unregulated Contaminant Monitoring Rule (UCMR4) between 2018 and 2020, providing valuable information about possible algal toxins in the public water supply.

If you want to know how algal toxin levels vary over time

The Shillington Municipal Authority conducted 32 sampling events for total microcystins, cylindrospermopsin, and anatoxin-a during summer 2019. None of these samples showed detectable levels of these toxins above their respective reporting limits (0.3 µg/L for total microcystins, 0.09 µg/L for cylindrospermopsin, and 0.03 µg/L for anatoxin-a). These results reflect snapshots during a specific period and may vary seasonally or across multiple years depending on environmental factors affecting local surface waters, such as temperature and nutrient levels.

If you wonder what the detection limits and federal standards imply

It is important to understand that no federal maximum contaminant level (MCL) currently exists for these algal toxins. Instead, the EPA provides 10-day health advisories as guidance for total microcystins and cylindrospermopsin. The lack of detection above reporting limits means the measured levels were low or absent during monitoring but does not guarantee individual household water quality. The presence below reporting levels is considered not to pose health concerns according to EPA guidelines. However, these are not enforceable legal limits but advisory benchmarks to guide water providers and consumers.

If you are considering what information to gather before seeking treatment options

Before pursuing any water treatment for algal toxins, document your water source type (public surface water or private well). Identify recent water quality reports from your water supplier or arrange for testing by a certified laboratory that includes analysis for total microcystins, cylindrospermopsin, and anatoxin-a. Record the concentration results and note the date and method of sampling. This information is essential for understanding whether treatment for algal toxins would address a specific concern in your household water supply.

If you plan to interpret certified laboratory results for algal toxins

Certified labs provide quantitative measurements of algal toxins with reporting limits comparable to those used by the EPA. A result below the reporting level generally indicates that the toxin is not present in detectable amounts at the time of sampling. If detected, concentrations can be compared against EPA's 10-day health advisories to assess potential health concerns. Since no enforceable standards exist, interpreting these results should consider your household's vulnerability and water use patterns alongside the advisory levels.

If you want to understand how treated water differs with an algal toxin-specific filter

Using a treatment system designed to reduce algal toxins will reduce microcystins, cylindrospermopsin, and anatoxin-a concentrations in your tap water. The C-Series Algal Toxins (Cyanotoxins) Filter ships ready to configure for household use and uses specialized filtration media shown to adsorb these toxins effectively. After the system is in place, you can expect a marked reduction or removal of algal toxin compounds, improving water quality especially during events of algal blooms in source waters.

If you need to match treatment capacity to your household water usage

To select the correct capacity for a cyanotoxin filter, determine your household’s average daily water demand. This includes typical uses such as drinking, cooking, and bathing. Understanding your daily consumption helps in choosing a filtering system with sufficient media volume and flow rate to handle your water needs without compromising filtration efficiency. The C-Series system offers configurations scalable to various household sizes and water demands.

When you have your household’s water demand documented and sampling results for algal toxins in hand, the C-Series Algal Toxins (Cyanotoxins) Filter can be evaluated as a targeted solution to reduce these compounds effectively in your Berks County home.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2019-09-19. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR4 monitoring (2018-2020) for Shillington Mun. Auth. (PA3060067), PA: 96 results across 3 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level