If you notice your water treatment setup in Bear or Hockessin struggling to cope with algal toxins at your taps, you are facing a situation many households share in New Castle County. The public water system serving this area, the Artesian Water Company, relies on surface water sources which are monitored for algal toxins like microcystins, cylindrospermopsin, and anatoxin-a.
If you consider the role of plumbing material and age separate from source water
Your home's pipes and fixtures might influence how algal toxins appear at the tap independently of the water source. Older plumbing with rough or corroded surfaces can harbor biofilms where toxins accumulate or react differently. Newer materials might be less reactive but do not eliminate algal toxins themselves. Therefore, local plumbing condition is a factor apart from the water source quality as documented by the Artesian Water Company.
If you want to understand how treated water changes at the tap after adding specialized filtration
Using targeted filtration such as the C-Series Algal Toxins (Cyanotoxins) Filter can reduce algal toxin levels by capturing and neutralizing these compounds before they reach your faucet. This technology is designed to address the types of algal toxins monitored by the EPA in your water system area, although individual home testing is needed to confirm specific levels. After configuring the C-Series System, you can expect treated water with much lower algal toxin risk at points of use.
If you need to know what information to record before seeking expert advice on treatment options
- Details about your current water treatment equipment including type, capacity, and maintenance history
- Any recent water testing results from certified laboratories measuring microcystins, cylindrospermopsin, and anatoxin-a
- Observations about water appearance, taste, and any unusual residue or staining
- Age and material of your household plumbing and fixtures
- Frequency and duration of water usage to assess treatment demand
Having this information ready helps clarify whether your existing equipment’s inability to keep up is due to capacity, changes in water quality, or plumbing factors.
If you are a commercial or industrial operator, what extra questions arise beyond household concerns
Businesses and facilities typically must consider compliance with regulatory monitoring, higher daily water volumes, and the potential impact of algal toxins on processes or products. Additional water quality parameters and routine monitoring schedules may be required. Unlike private household use, commercial operations need an integrated approach assessing system-wide toxin levels, not just at single taps.
If you see household symptoms that do and do not point to algal toxins in drinking water
Signs possibly related to algal toxins include unusual tastes or odors that do not improve with basic filtration, unexpected staining or deposits, or health symptoms when no other cause is apparent. Conversely, common issues like hardness, iron staining, or chlorine taste are separate and do not indicate algal toxin presence. Confirming algal toxins requires specific testing because they do not always produce obvious sensory cues.
During 2018–2020, Artesian Water Company’s public water system record showed no detection of algal toxins above reporting levels in its periodic monitoring under EPA’s Unregulated Contaminant Monitoring Rule 4. This record covers the broad community supply in Bear and Hockessin but does not reflect individual home plumbing conditions or temporary changes. For precise knowledge of your household water, certified laboratory testing is necessary.
For full government data on algal toxin monitoring in New Castle County’s Artesian Water Company system, visit the EPA’s Safe Drinking Water Information System public records.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2018-07-24. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR4 monitoring (2018-2020) for Artesian Water Company (DE0000552), DE: 24 results across 3 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level