Union County, NC

Water Treatment in Monroe, NC

What City of Monroe's latest water quality report says, and what it means for a Monroe home.

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Local water snapshot

City of Monroe

From its 2025 water quality report · read the full report

Water source: Monroe Lakes system (Lake Twitty, Lake Lee and Lake Monroe), treated at the John Glenn Water Treatment Plant; supplemented through an interconnection with Union County Water (Catawba River source); City of Monroe serves about 43,081 people.; City of Monroe, 2025
Disinfectant: Chloramine; City of Monroe, 2025
TTHM (disinfection byproducts): 53 ppb; As reported (2025); federal limit 80 ppb.; City of Monroe, 2025
HAA5 (disinfection byproducts): 41 ppb; As reported (2025); federal limit 60 ppb.; City of Monroe, 2025
Lead (at sampled homes' taps): 0 ppb; 90th percentile of homes sampled (2023); 0 sampled homes above the action level. The federal action level is 15 ppb.; City of Monroe, 2025
Violations: Yes, see report; The report lists one or more violations and explains them. Read it for details.; City of Monroe, 2025

What this means for your home

Monroe is inside City of Monroe's service area on the state's water-system map.

City of Monroe's report doesn't list hardness. Most reservoir-fed systems in this region are soft, but a quick hardness test at your tap is the only way to know before anyone recommends a softener.
City of Monroe's report lists chloramine as its disinfectant. Chloramine is more stable than free chlorine, so if you want to reduce it, choose catalytic carbon certified for chloramine reduction rather than a basic chlorine filter.
Disinfection byproducts (TTHM) were 53 ppb against an 80 ppb limit. That's compliant; some households still prefer a margin, which NSF/ANSI 53 carbon or reverse osmosis provides.
39.5% of homes in Monroe were built before 1980. EPA notes homes built before 1986 are more likely to have lead in their plumbing, so a certified-lab lead test at the tap is a sensible first step in an older home.

Recommended for Monroe homes

Based on the data above. Your own test results always come first.

Chlorine taste & odorCertified carbon at the kitchen tap or for the whole home.Drinking-water reverse osmosisNSF/ANSI 58 RO at the kitchen tap.Water testingCertified-lab lead and full-panel testing.Whole-home filtrationSediment plus catalytic carbon for the whole house.

How it works

Step 1
Test
We read your utility's report with you, and run a certified-lab test when your home calls for one.
Step 2
Design
You get a written recommendation and quote for only what the data supports.
Step 3
Licensed install
An independent licensed plumber installs under a separate agreement with you.
Step 4
Retest
We confirm the system is doing what it's certified to do.

Monroe at a glance

Population: 42,644; July 2025 estimate · U.S. Census Bureau, 2025
Households: 12,620; U.S. Census Bureau (via Census Reporter), 2024
Owner-occupied homes: 61.6%; U.S. Census Bureau (via Census Reporter), 2024
Median home value: $309,100; U.S. Census Bureau (via Census Reporter), 2024
Homes built before 1980: 39.5%; U.S. Census Bureau (via Census Reporter), 2024

Monroe water questions

Who supplies water in Monroe?

Monroe is inside City of Monroe's service area on the state's water-system map. Its supply is monroe lakes system (lake twitty, lake lee and lake monroe), treated at the john glenn water treatment plant; supplemented through an interconnection with union county water (catawba river source). EPA's registry lists it serving about 43,081 people.

Does City of Monroe report PFAS?

Its latest report doesn't include PFOA or PFOS results we can publish. EPA's enforceable limits for PFOA and PFOS are 4.0 parts per trillion; other proposed PFAS limits are under review.

Do homes in Union County use private wells?

Union County Environmental Health states that approximately 25 percent of Union County's population relies on groundwater as their source for drinking water. In state testing of private wells in Union County, 19.46% of 5,154 private wells tested (1,003 wells) were above the 10 µg/L EPA drinking water standard (MCL) for arsenic. These figures describe the wells that were tested, not every well in the county.

How old are homes in Monroe, and does that matter for water?

Census estimates put 39.5% of Monroe homes as built before 1980. Lead usually comes from a home's own plumbing, not the utility, so in older homes a certified-lab lead test at the tap is the honest starting point.

Do you serve Monroe?

Yes. Monroe is about 33 minutes from our Charlotte base. Installation is performed by an independent, NC-licensed plumbing contractor under a separate agreement with you.

Do I need a permit to install a water treatment system?

Whole-house treatment is plumbing work in North Carolina. Your independent licensed plumber determines and pulls any permit Union County requires.

Nearby areas we serve

All of Union County Every county and town we serve Look up your water by ZIP

Get an honest answer about Monroe water.

Tell us about your home and water source. We'll recommend testing first, and only the equipment your results support.