Tap Water Quality Report
Tap water quality in YUMA, Arizona
Tap water in YUMA, Arizona receives a grade of C (72/100) from TapWaterSafety.org. It's served by CITY OF YUMA. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Arsenic significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in YUMA's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving YUMA.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 23.7 ppb, 395x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.48 ppb, 371x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 53.5 ppb, 357x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for CITY OF YUMA (system ID AZ0414024) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 12/01/2024 | 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 YUMA
Filters matched to the specific contaminants in YUMA'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 YUMA'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 |
23.7 ppb | 0.06 | — | — | — | — | — | 395× over |
| Arsenic Heavy metal |
1.48 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 371× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
53.5 ppb | 0.15 | 80.0 | 100 | — | — | — | 357× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
12.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 122× over |
| Radium, combined (-226 and -228) Radiological |
0.18 pCi/L | 0.05 | 5.0 | — | — | — | — | 3.7× over |
| Chlorite Disinfection byproduct |
146.9 ppb | 50.0 | 1000.0 | — | — | — | — | 2.9× over |
| Nitrate and nitrite Inorganic |
0.297 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.1× over |
| Nitrate Inorganic |
0.23 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.6× over |
| Bromochloromethane Other |
0.0563 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
174.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Chromium (hexavalent) Heavy metal |
0.00406 ppb | 0.02 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
109.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
5.43 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
2.36 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.512 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
1.15 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.392 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
90.3 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 CITY OF YUMA.