Tap Water Quality Report
Tap water quality in KANSAS CITY, Kansas
Tap water in KANSAS CITY, Kansas receives a grade of C (78/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily WATER DISTRICT 1 OF JOHNSON CO. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in KANSAS CITY's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving KANSAS CITY.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 13.3 ppb, 221x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 16.6 ppb, 111x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 9.93 ppb, 99x above the EWG health guideline of 0.1 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.275 ppb.
EPA compliance record
Official U.S. EPA records for WATER DISTRICT 1 OF JOHNSON CO (system ID KS2009110) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Water systems serving KANSAS CITY
KANSAS CITY is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
WATER DISTRICT 1 OF JOHNSON CO
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
KANSAS CITY BOARD OF PUBLIC UTILITIES
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
Recommended filters for KANSAS CITY
Filters matched to the specific contaminants in KANSAS CITY's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in KANSAS CITY's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
30.6 ppb | 0.06 | — | — | — | — | — | 509× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
32.2 ppb | 0.15 | 80.0 | 100 | — | — | — | 215× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
15.5 ppb | 0.1 | 60.0 | 60 | — | — | — | 155× over |
| Chromium (hexavalent) Heavy metal |
1.85 ppb | 0.02 | — | — | — | — | — | 92× over |
| Bromodichloromethane Disinfection byproduct |
4.9 ppb | 0.06 | — | — | — | — | — | 82× over |
| Arsenic Heavy metal |
0.275 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 69× over |
| Chloroform Disinfection byproduct |
16.6 ppb | 0.4 | — | — | — | — | — | 42× over |
| Dibromochloromethane Disinfection byproduct |
3.87 ppb | 0.1 | — | — | — | — | — | 39× over |
| Bromate Disinfection byproduct |
3.16 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 32× over |
| Chlorite Disinfection byproduct |
426.1 ppb | 50.0 | 1000.0 | — | — | — | — | 8.5× over |
| Nitrate Inorganic |
0.96 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.9× over |
| Uranium Radiological |
2.49 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 5.8× over |
| Atrazine Pesticide/Herbicide |
0.146 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| Radium, combined (-226 and -228) Radiological |
0.06 pCi/L | 0.05 | 5.0 | — | — | — | — | 1.2× over |
| Chlorate Disinfection byproduct |
163.8 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
110.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
2.72 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
4.01 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
2.4 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Manganese Heavy metal |
0.37 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Aluminum Heavy metal |
1.25 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.00592 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
1.06 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.548 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
2.03 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.74 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
52.4 ppb | — | — | — | — | — | — | Below guideline |
| Metolachlor Pesticide/Herbicide |
0.05 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from WATER DISTRICT 1 OF JOHNSON CO.