Union Tap Water Quality Report
Union's water has 1 contaminant above EPA MCLGs. Consider using a certified water filter for additional protection.
Other systems listed for Union with results above guidelines: FRANKLIN COUNTY PWSD 3 (1 above guidelines)
People Served
12,348
Health-based violations since 2020
0
UNION PWS. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Dec 2020 · UNION PWS
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Union Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Union's water has 1 contaminant above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
UNION PWS, Union's water system, serves 12,348 people. 4 other systems are listed for Union. Each system's results are listed under its own name, never added to UNION PWS's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for UNION PWS is from Dec 2020.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Missouri
Union Water Service Areas
What these numbers actually mean for Union, MO
We read Union, MO’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 1 contaminant above EPA MCLGs and 11 contaminants with an EPA health goal detected in some samples (no level on file)
- 170 results on file
- 23 PFAS compounds on record
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Recommended Water Filters for Union
Based on Union's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
Waterdrop
G3 P600
NSF Certified:
Flow Rate
600 gpm
Daily Production
600 gpd
Highlights:
- Space-saving design
- Good contaminant reduction
- NSF-58 certified
Removes 4 contaminants:
iSpring Water Systems LLC
RCC7
NSF Certified:
Daily Production
21.04 gpd
Highlights:
- NSF-58 certified reverse osmosis system
- 21.04 GPD production capacity
- Reduces total dissolved solids (TDS) for purer water
Removes 1 contaminants:
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Union's water readings can explain
Utility-reported data for Union includes iron and sulfate — the readings behind these common tap water questions. We publish a city-level hardness figure for Union, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Union? Public-water results do not apply to private wells. See Franklin County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Union
Union's tap water measures 12.5 grains per gallon (214.5 mg/L) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 12.5 gpg water in Union — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Missouri as a whole, read water softener cost in Missouri — priced against the plumber wage published for the state.
Frequently Asked Questions About Union Tap Water
Union's water has 1 contaminant above EPA MCLGs. While the water meets federal legal limits, we recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach UNION PWS. For a problem with your water now (discolored water, no water, low pressure, a leak), contact UNION PWS directly.
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