Tap Water Quality Report
Tap water quality in JOPLIN, Missouri
Tap water in JOPLIN, Missouri receives a grade of C (77/100) from TapWaterSafety.org. It's served by MO AMERICAN JOPLIN. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in JOPLIN's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving JOPLIN.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 39.2 ppb, 653x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 20.6 ppb, 206x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 23.6 ppb, 158x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for MO AMERICAN JOPLIN (system ID MO5010413) 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.
Recommended filters for JOPLIN
Filters matched to the specific contaminants in JOPLIN'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.
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 JOPLIN'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 |
39.2 ppb | 0.06 | — | — | — | — | — | 653× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
20.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 206× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
23.6 ppb | 0.15 | 80.0 | 100 | — | — | — | 158× over |
| Bromodichloromethane Disinfection byproduct |
5.57 ppb | 0.06 | — | — | — | — | — | 93× over |
| Trichloroacetic acid Disinfection byproduct |
8.8 ppb | 0.1 | — | — | — | — | — | 88× over |
| Dichloroacetic acid Disinfection byproduct |
11.8 ppb | 0.2 | — | — | — | — | — | 59× over |
| Chloroform Disinfection byproduct |
16.7 ppb | 0.4 | — | — | — | — | — | 42× over |
| Radium, combined (-226 and -228) Radiological |
1.02 pCi/L | 0.05 | 5.0 | — | — | — | — | 20× over |
| Dibromochloromethane Disinfection byproduct |
1.37 ppb | 0.1 | — | — | — | — | — | 14× over |
| Nitrate Inorganic |
0.563 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.0× over |
| Nitrate and nitrite Inorganic |
0.563 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.0× over |
| Chromium (hexavalent) Heavy metal |
0.0775 ppb | 0.02 | — | — | — | — | — | 3.9× over |
| Atrazine Pesticide/Herbicide |
0.167 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| Chlorate Disinfection byproduct |
99.8 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
100.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
0.265 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.495 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
3.33 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Manganese Heavy metal |
0.254 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.0646 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.504 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
9.49 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 MO AMERICAN JOPLIN.