Water Quality

Anderson Regional Joint Water System, Hartwell Lake Filter Plant is committed to providing residents with a safe and reliable supply of high-quality drinking water. We test the water using sophisticated equipment and advanced procedures. Your water meets state and federal standards for both appearance and safety. This annual “Consumer Confidence Report,” required by the Safe Drinking Water Act (SDWA), tells you where your water comes from, what our tests reveal about it, and conveys other important details that you should know about your drinking water.

The Water Treatment Process

The Joint Water System draws its raw water supply from the Six and Twenty Branch of Lake Hartwell. Water from all rivers and reservoirs can contain a variety of organisms and inorganic material that must be removed at a water treatment plant before the water is safe for drinking and other uses. Different treatment plants can vary in the specific processes they use, but they generally follow the same basic steps.

Anderson Regional is unique in that Ozone is used as a pre-treatment technique for removing taste and odor from the raw water associated with algal blooms Lake Hartwell. After any algal compounds are removed through oxidation, the raw water begins a conventional treatment process.

In the water treatment process, a coagulant is added to the water to encourage suspended organic material to bind together into large clusters, called flocs. These flocs are heavier than water and, along with larger particles such as sand and silt, are allowed to settle out. This process removes over 80% of suspended matter in the water.

Smaller particles that do not settle out are removed in a separate filtering process. The Joint Water System employs a conventional dual media gravity filtering method for treating water at the plant. Under this method, the settled water is allowed to pass through layers of sand, anthracite coal, and gravel that capture any remaining particles. This method of separating water molecules from contaminants has been proven to be economical, safe and highly effective in producing high-quality treated water. Federal standard for removing suspended particles (turbidity) is 1 unit or less. The Lake Hartwell Treatment Plant averages 0.06 of 1 unit. Water that has been filtered has had over 99.99% of the suspended matter removed.

Next, the water travels to the filtration system. The filtration system removes any remaining floc that may be present after clarification. The filters are constructed of dual media containing anthracite coal and sand. Water flows down through the dual media system and yields high-quality, clean water.

Finally, to eliminate organisms that can cause disease or unpleasant odors and taste in water, a long-lasting disinfecting chemical is applied that will keep water safe and healthy for the days or weeks it may travel through pipelines to reach homes and businesses. The Joint Water System employs a mixed oxidant, or MIOX, system of disinfectant that is generated at the plant. MIOX has proven to be longer lasting and more effective in maintaining water quality in the distribution system than conventional gas chlorine while being safe to handle.

What is a CCR? A CCR is a Consumer Confidence Report, also called an annual water quality report or drinking water quality report. Every community water supplier is required to provide a CCR to customer by July 1st of each calendar year.

What information is included in a CCR? The CCR provided by Anderson Regional Joint Water System outlines: source of drinking water, level of contaminants in water source, EPA levels for safe contaminant levels, general information about cryptosporidium, and other specific information about your water source.

Download CCR

For more information about CCR for drinking water, please visit https://www.cdc.gov/healthywater/drinking/public/understanding_ccr.html


Awards and Recognition
The Area Wide Optimization Program (AWOP) water quality goals are established by SC DHEC. These standards are rigorous and involve enhanced filtration and treatment systems, which produces what that is approximately 10 times better quality than regulatory standards. Water systems that receive this award go above and beyond to provide the safest, best quality water to the communities that they serve. ARJWS has received the AWOP award for the past 10 consecutive years.


Lab Testing
As part of our commitment to water quality, the ARJWS lab is constantly testing source water and drinking water for the following parameters. Over 200 water quality tests are conducted daily.

pH, conductivity, alkalinity, hardness, fluoride, color, THM, chlorine, turbidity, total coliform

ELISA testing for 3 algal toxins (anatoxin A, microcystin, cylindrospermopsin)


Field Sampling
Field sampling is conducted weekly by ARJWS staff. Our sample site plan identifies sampling sites and a sample collection schedule that is representative of water throughout the distribution system. The purpose of the sample site plan is to ensure that bacteriological contamination cannot persist undetected in the distribution system.

Sample sites have been chosen to ensure adequate representation of water throughout the distribution system. The number of samples collected and frequency of collection is based on population served.


Staff Experience and Certification
Anderson Regional Joint Water System boasts an experienced, trained, certified staff. With 5 A-licensed operators and several licensed operator trainees, ARJWS is committed to producing safe, high quality drinking water.