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UV, Reverse Osmosis & Specialty Treatment

Well UV systems cost $600–$2,200 and under-sink RO $300–$950. Compare treatment for bacteria, nitrate, arsenic and low pH, then get local quotes.

  • Softeners $1,200–$3,800 installed (HomeGuide)
  • Iron filtration $1,000–$3,500 installed (HomeGuide)
  • Free quotes from licensed local contractors
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Typical national cost$1,200 – $3,600Cost guide →

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About UV, Reverse Osmosis & Specialty Treatment

Some well problems are not cosmetic. EPA's health-based standards (MCLs) for public water systems are: nitrate 10 mg/L as N, arsenic 10 µg/L, and total coliform a goal of zero. When a private well tests above those numbers, homeowners usually look at treatment. Our job is to show what each option costs and connect you with independent local pros. We don't make medical calls; your county health department can explain what your results mean for your household.

UV disinfection treats bacteria at the point the water enters the house. Reverse osmosis (under-sink or whole-house) and anion exchange are the systems HomeGuide prices for nitrate. Arsenic systems are priced separately. Bacteria often trace back to the well itself, so shock chlorination and a well inspection usually come before a UV purchase.

Flow diagram of a whole-house well water treatment train. Water from the pressure tank passes, in order, through a sediment filter, a neutralizer or iron filter, a water softener with its brine tank, and an ultraviolet (UV) light, then goes to the house. A branch at the kitchen sink feeds an under-sink reverse osmosis unit with its own drinking-water faucet.
UV treats all the water where it enters the house and goes last in the train, so the water is clear when it reaches the lamp. Reverse osmosis treats drinking water at one tap.

Common Jobs We Route

  • UV disinfection ($600–$2,200 installed; HomeGuide $700–$2,500)
  • Under-sink RO ($300–$950)
  • Whole-house RO ($4,800–$8,000)
  • Nitrate treatment ($300–$5,000)
  • Arsenic treatment ($1,000–$4,000)
  • Lead treatment ($300–$2,000)
  • pH neutralizer ($800–$2,500)
  • Water distiller ($1,200–$4,000)
Cutaway of a kitchen sink cabinet with a reverse osmosis system. Cold water passes through two prefilter cartridges for sediment and chlorine or taste, then through the RO membrane. Purified water collects in a small storage tank and goes up to its own faucet on the sink, while the membrane sends the rejected water, carrying the dissolved contaminants, down a drain line to the sink drain.
An RO system pushes water through a fine membrane that holds back dissolved solids such as nitrate and arsenic. It makes drinking water for one faucet and sends the rejected water down the drain.

What Affects the Price

Providers quote their own work — these are the factors that consistently move the number.

  • Point-of-use vs whole-house
  • Pre-filtration needed ahead of UV (sediment, iron)
  • Electrical work ($100–$400)
  • Annual consumables: UV lamp $50–$150/yr, quartz sleeve $30–$80, RO membrane $50–$200

Cost Guides

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UV, Reverse Osmosis & Specialty Treatment FAQs

Should I install UV or shock my well?

Shock chlorination is the usual first step after a positive bacteria test. Retest 7–14 days later. If results keep coming back positive, ask a pro about finding the source and about UV.

Does reverse osmosis remove nitrate and arsenic?

HomeGuide prices RO and anion exchange for nitrate and lists arsenic systems separately. Ask the installer which form of arsenic your lab found; Union County NC offers arsenic speciation for $80.

What changes for lead in 2027?

EPA's revised lead action level of 10 µg/L applies to public water systems from Nov 1, 2027. Private-well owners can use it as a reference point.

UV, Reverse Osmosis & Specialty Treatment by Area

UV, Reverse Osmosis & Specialty Treatment in Marion County, FLUV, Reverse Osmosis & Specialty Treatment in Union County, NCUV, Reverse Osmosis & Specialty Treatment in Johnston County, NCUV, Reverse Osmosis & Specialty Treatment in Franklin County, NCUV, Reverse Osmosis & Specialty Treatment in Parker County, TXUV, Reverse Osmosis & Specialty Treatment in McLennan County, TX

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