Summerville Water Treatment & Water Filtration

Water‑treatment systems use different technologies depending on the problem you’re trying to solve. Filters physically trap or adsorb contaminants; for example, carbon or micro‑filters remove sediment and help with taste and odor. Purification systems go further—reverse osmosis, distillation and ultraviolet treatment are designed to remove parasites, bacteria and viruses and many chemicals. Water softeners, by contrast, do not disinfect the water; they use ion‑exchange resin to remove minerals like calcium and magnesium that cause “hard water” and may also reduce some heavy metals. Choosing the right technology starts with understanding what contaminants you need to address.

Home water softeners are ion‑exchange devices. The system contains resin beads that are coated with sodium or potassium ions. As hard water passes through the resin, the beads “trade” their sodium or potassium ions for calcium and magnesium; the water leaving the unit contains fewer hardness minerals and is considered “soft”. When all exchange sites are occupied, the unit regenerates by flushing a concentrated salt or potassium solution through the resin to remove the accumulated minerals. Softeners primarily remove minerals (calcium, magnesium and sometimes iron or manganese); they do not remove parasites, bacteria or viruses, which is why they are often paired with filtration or purification systems when water contamination is a concern.

There is no requirement to soften your water—some hardness is not a health hazard. The U.S. Minnesota Department of Health notes that homeowners might consider a softener when water hardness exceeds about 7 grains per gallon (120 mg/L), because high levels of calcium and magnesium can plug pipes, damage water heaters and make soaps less effective. Water hardness classifications range from “slightly hard” at 1–3.5 gpg to “very hard” above 10.5 gpg. Testing your water hardness—either via an inexpensive home kit or through a state‑certified lab—will help determine whether a softener is necessary. For hardness below 7 gpg, simply living with the hardness is often acceptable.

Soft water helps prevent scale inside pipes and water‑heater tanks, reduces mineral spots on glassware and eliminates soap film and detergent curds, leading to easier cleaning and longer appliance life. The technology is reliable and has been used in homes for decades. However, softening exchanges hardness minerals for sodium, adding about 7.5 mg of sodium per quart for every grain of hardness removed; this could be a concern for people on low‑sodium diets. Softening also removes beneficial minerals like calcium and magnesium and can increase corrosion potential in plumbing. In addition, regeneration cycles consume water and salt, potentially adding up to 50 gallons of wastewater per regeneration and contributing to environmental chloride pollution.

Reverse‑osmosis (RO) units push water through a semi‑permeable membrane with pores around 0.0001 micron. They are capable of removing parasites, bacteria and viruses as well as many chemicals—including lead, copper, chromium, chloride, sodium, arsenic, fluoride, nitrate and sulfate. For most households using municipally treated water, RO is not essential because public water supplies already meet federal standards. However, RO can be useful for people with private wells or specific contaminants (e.g., high nitrate or heavy metals). Note that RO systems generate a “reject” stream; inefficient models can waste 5–10 gallons for every gallon of treated water, though WaterSense‑certified units are limited to 2.3 gallons of waste per gallon produced.

Every public water system must issue an annual Consumer Confidence Report (CCR) with state‑certified lab results comparing water quality to federal standards. If you have not received a CCR or you rely on a private well, the U.S. EPA recommends testing your water through a state‑certified laboratory. Understanding your water quality will help you determine whether you need to address taste and odor, remove specific contaminants like lead or PFAS, or simply reduce hardness. Once you know your treatment goals, look for devices certified to NSF/ANSI standards for the contaminants you need to remove—for example, NSF/ANSI 42 for taste and odor or NSF/ANSI 44 for water softeners.