Drinking water quality · 2025
· Verified
What's in Yuma, AZ tap water
20 contaminants were measured in the Yuma, AZ water system's 2025 annual report. Each is shown below against its federal limit.
- Reporting year
- 2025
- Contaminants measured
- 20
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- AZ
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Yuma, AZ
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
Lithium
● Detected (no federal limit)above national p90 (76.59999999999991 mg/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Yuma, AZ's drinking water comes from ground water, drawn from 6 sources.
Source
- IN-C1402401SI - YUMA MAIN CANAL
- WL-55-202044
- WL-55-805921
- IN-C1402402SI - GILA GRAVITY B CANAL
- + 2 more
Treatment
- TP001 - CL2, CLO2
- TP002 - CL2, CLO2
- TP003 - 4LOG
Distribution
Historical readings · EPA Six-Year Review (2012–2019)
1 contaminant historically over EPA limits in Yuma, AZ
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
TTHM worst: 2013 | 0.11 mg/L 1.4× | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
CHLORITE worst: 2017 | 0.58 mg/L within | 1 mg/L | '14'15'16'17'18'19 |
ARSENIC worst: 2018 | 0.0039 mg/L within below national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2013 | 0.021 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
FLUORIDE worst: 2012 | 0.53 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
BARIUM worst: 2016 | 0.12 mg/L within near national p90 | 2 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE worst: 2018 | 0.34 mg/L within | 10 mg/L | '12'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2016 | 0.31 mg/L within | 10 mg/L | '12'14'15'16'17'18'19 |
GROSS ALPHA worst: 2017 | 0.2 pCi/L within | 15 pCi/L | '17 |
CHROMIUM worst: 2017 | 0.001 mg/L within below national p90 | 0.1 mg/L | '17 |
URANIUM worst: 2017 | 0.004 ug/L within below national p90 | 30 ug/L | '17 |
COPPER worst: 2012 | 0.44 mg/L below national p90 | — | '12'15'18 |
LEAD worst: 2012 | 0.0082 mg/L | — | '12'15'18 |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.57 mg/LRunning annual avgSystem-wide | 4 mg/LMRDL | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.554 pCi/LReported levelAgua Viva | 5 pCi/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SeleniumA trace element from natural deposits and industrial discharge. | 2.7 ug/LReported levelMain Street | 50 ug/LMCL | Within the limit |
| NickelA metal from natural deposits and industrial discharge. | 1.9 ug/LReported levelAgua Viva | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 110 mg/LReported levelAgua Viva | None set | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0.15Reported levelSystem-wide | 5MCL | Within the limit |
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelSystem-wide | 0MCL | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFAS | Not detected ng/LAverageMain Street | None set | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.31–1.38RangeQuarterly Running Annual Average | None set | Detected — no federal limit |
People also ask about Yuma, AZ's water
+Is Yuma, AZ tap water safe to drink in 2025?
Every one of the 20 contaminants measured in Yuma, AZ's 2025 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Yuma, AZ tap water?
20 contaminants were measured in Yuma, AZ's 2025 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 13 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Yuma, AZ tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Gross Alpha. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Yuma, AZ's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Yuma, AZ's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2025 report; a new report will replace it once the utility publishes its next annual update.