Tap Water Quality Report
Tap water quality in MIDWEST CITY, Oklahoma
Tap water in MIDWEST CITY, Oklahoma receives a grade of D (66/100) from TapWaterSafety.org. It's served by MIDWEST CITY. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Chromium (hexavalent) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in MIDWEST CITY's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving MIDWEST CITY.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 62.9 ppb, 1048x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 27.1 ppb, 181x above the EWG health guideline of 0.15 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 3.11 ppb, 156x above the EWG health guideline of 0.02 ppb.
EPA compliance record
Official U.S. EPA records for MIDWEST CITY (system ID OK1020806) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Nitrate Rule | Missed testing or reporting | 01/01/2024 | Open |
| Ground Water Rule | Missed testing or reporting | 08/22/2024 | Open |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 04/01/2024 | Open |
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 MIDWEST CITY
Filters matched to the specific contaminants in MIDWEST 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.
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 MIDWEST 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 |
62.9 ppb | 0.06 | — | — | — | — | — | 1048× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
27.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 181× over |
| Chromium (hexavalent) Heavy metal |
3.11 ppb | 0.02 | — | — | — | — | — | 156× over |
| Bromodichloromethane Disinfection byproduct |
8.52 ppb | 0.06 | — | — | — | — | — | 142× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
8.56 ppb | 0.1 | 60.0 | 60 | — | — | — | 86× over |
| Dibromochloromethane Disinfection byproduct |
5.09 ppb | 0.1 | — | — | — | — | — | 51× over |
| Trichloroacetic acid Disinfection byproduct |
3.58 ppb | 0.1 | — | — | — | — | — | 36× over |
| Chloroform Disinfection byproduct |
13.0 ppb | 0.4 | — | — | — | — | — | 32× over |
| Dibromoacetic acid Disinfection byproduct |
0.739 ppb | 0.03 | — | — | — | — | — | 25× over |
| Dichloroacetic acid Disinfection byproduct |
4.18 ppb | 0.2 | — | — | — | — | — | 21× over |
| Bromate Disinfection byproduct |
0.558 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 5.6× over |
| Radium, combined (-226 and -228) Radiological |
0.2 pCi/L | 0.05 | 5.0 | — | — | — | — | 4.1× over |
| Nitrate and nitrite Inorganic |
0.249 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.8× over |
| Bromoform Disinfection byproduct |
0.567 ppb | 0.5 | — | — | — | — | — | 1.1× over |
| Uranium Radiological |
0.48 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 1.1× over |
| Chlorate Disinfection byproduct |
167.0 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
351.6 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
7.58 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Chlorite Disinfection byproduct |
2.77 ppb | 50.0 | 1000.0 | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.288 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Molybdenum Other |
0.0957 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.0569 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.0107 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.268 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
2.62 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Dalapon Pesticide/Herbicide |
0.0265 ppb | — | 200.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.109 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
11.7 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 MIDWEST CITY.