Is Yuma, AZ Tap Water Safe to Drink?
Graded F — but Copper, Strontium and 3 more were detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
36.1/100
waterverge.com Yuma, AZ — Water Quality Report
Yuma's drinking water received a grade of F (36.1 out of 100), indicating failing water quality. The city's 20 water systems serve approximately 156,943 residents using surface water.
Lead levels were measured at 6.1 ppb (90th percentile), which is within EPA limits but above recommended levels. UCMR 5 testing detected 2 PFAS compounds in the water supply.
The system has 4943 violations on record, including 318 health-based violations. 779 remain unresolved.
What to know about Yuma's water
Yuma ranks #287 out of 292 cities in Arizona for water quality, placing it among the lowest-rated in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
PFAS compounds were detected in testing, though levels remain within current EPA limits. Residents seeking extra precaution may consider an activated carbon or reverse osmosis filter.
Hexavalent chromium (chromium-6) was detected at 0.72 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection.
The system has seen 642 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Yuma, AZ water safe to drink?
Yuma's drinking water has significant quality concerns based on EPA testing data. With a grade of F (36.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 20 water systems serve approximately 156,943 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Yuma
A timeline of significant water quality events, violations, and data updates.
Detected at levels within current EPA limits. PFAS persist indefinitely in the environment.
Latest EPA compliance and testing data incorporated into Yuma's water quality assessment. Grade: F (36.1/100).
Contaminants: Revised Total Coliform Rule, Chlorine.
Contaminants: Public Notice, Chlorine.
1 health-based. Contaminants: Public Notice, Consumer Confidence Rule, Nitrite.
Federal disaster declaration (FEMA DR-3241). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Yuma's water supply.
Within EPA limits but above the American Academy of Pediatrics recommended level of 1 ppb. An NSF 53-certified filter provides additional protection.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Detected but within current EPA limits. PFAS do not break down in the environment and can accumulate in the body over time. An activated carbon filter can reduce exposure.
PFAS "forever chemicals" detected
UCMR 5 testing found 2 PFAS compounds in Yuma's water supply. PFAS are synthetic chemicals that persist indefinitely in the environment and the human body.
Violation history
Yuma's water system has 4,943 total violations on record, including 318 health-based violations. 779 remain unresolved. 642 violations were issued in the last 5 years.
Flood & environmental risk
Yuma County has experienced 3 federally declared disasters since 1983. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Colorado River Below Imperial Dam, Az-Ca, Colorado River Below Laguna Dam, Az-Ca, Colorado Rvr, Colorado R, Colorado River Below Cooper Wasteway.
Where does Yuma's water come from?
Yuma's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 20 water systems serving approximately 156,943 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Colorado River Below Imperial Dam, Az-Ca (river), Colorado River Below Laguna Dam, Az-Ca (river), Colorado Rvr (river), Colorado R (river), Colorado River Below Cooper Wasteway (river).
What Yuma residents can do
Recommended: Activated carbon or reverse osmosis filter. This addresses the specific contaminants found in Yuma's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Yuma's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Forever chemicals overview
National PFAS report →Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Yuma
Industrial polluters nearby
Reported releases to surface water by facilities near Yuma, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
CLARIOS LLC YUMA, AZ85365 | — | — | 9.8 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D2 — severe droughtYuma County is currently in D2 (severe drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Yuma County has experienced 3 federally declared disasters since 1983. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Yuma's water supply, we recommend the following filter types.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 6.1 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.70 | 1.3 | mg/L | Inorganic | Over Limit |
| 11Cl-PF3OUdS | ND | HI | µg/L | PFAS | Not Detected |
| 4:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 6:2 FTS 6:2 FTSPFAS A fluorotelomer sulfonate commonly found at sites contaminated with aqueous film-forming foam (AFFF) used in firefighting. Health EffectsPotential liver toxicity and endocrine disruption. Less studied but identified as a contaminant of concern. EPA LimitNo individual MCL (not yet regulated) Common SourcesFirefighting foam (AFFF), airports, military bases, and industrial facilities. | ND | HI | µg/L | PFAS | Not Detected |
| 8:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 9Cl-PF3ONS | ND | HI | µg/L | PFAS | Not Detected |
| ADONA | ND | HI | µg/L | PFAS | Not Detected |
| HFPO-DA HFPO-DA (GenX)PFAS A replacement for PFOA in manufacturing, marketed as safer but still a persistent "forever chemical." Also known as GenX. Health EffectsLiver and kidney effects, reproductive toxicity, immune system effects, and potential cancer risk. EPA Limit10 ppt MCL Common SourcesFluoropolymer manufacturing (used as PFOA replacement), industrial wastewater discharge. | ND | 0.01 | µg/L | PFAS | Not Detected |
| lithium LithiumInorganic A naturally occurring alkali metal found in groundwater. Monitored under UCMR 5 to assess occurrence in drinking water. Health EffectsKidney effects at high doses. Low-level exposure effects under study; some research suggests neurological effects. EPA LimitNo MCL (monitoring only under UCMR 5) Common SourcesNatural mineral deposits, geothermal water, and industrial discharge. | 210.000 | HI | µg/L | PFAS | Detected |
| NEtFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| NFDHA | ND | HI | µg/L | PFAS | Not Detected |
| NMeFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| PFBA PFBAPFAS One of the shortest-chain PFAS compounds. Very mobile in water and difficult to remove with standard filtration. Health EffectsThyroid effects, potential developmental toxicity. Shorter half-life in body than long-chain PFAS. EPA LimitNo individual MCL (not yet regulated) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and firefighting foam. | ND | HI | µg/L | PFAS | Not Detected |
| PFBS PFBSPFAS A short-chain PFAS used as a replacement for PFOS. While it clears the body faster than long-chain PFAS, it still persists in the environment. Health EffectsThyroid effects, reproductive and developmental toxicity, kidney effects. EPA LimitPart of Hazard Index (1.0) Common SourcesIndustrial discharge, firefighting foam, and as a replacement chemical in manufacturing. | ND | HI | µg/L | PFAS | Not Detected |
| PFDA | ND | HI | µg/L | PFAS | Not Detected |
| PFDoA | ND | HI | µg/L | PFAS | Not Detected |
| PFEESA | ND | HI | µg/L | PFAS | Not Detected |
| PFHpA PFHpAPFAS A medium-chain PFAS compound found in various environmental samples. Less studied than PFOA/PFOS but still considered a contaminant of concern. Health EffectsLiver effects, potential developmental toxicity, and endocrine disruption. EPA LimitPart of Hazard Index (1.0) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and contaminated water sources. | ND | HI | µg/L | PFAS | Not Detected |
| PFHpS | ND | HI | µg/L | PFAS | Not Detected |
| PFHxA PFHxAPFAS A short-chain PFAS replacement chemical widely used after manufacturers phased out longer-chain PFAS. Very commonly detected in water. Health EffectsLiver and kidney effects, potential thyroid disruption. Considered less toxic than long-chain PFAS but still persistent. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial processes, firefighting foam (AFFF), food packaging, and textile treatment. | ND | HI | µg/L | PFAS | Not Detected |
| PFHxS PFHxSPFAS A medium-chain PFAS found in firefighting foam and consumer products. It has a long half-life in the human body, similar to long-chain PFAS. Health EffectsImmune system effects, thyroid disruption, and potential reproductive and developmental harm. EPA LimitPart of Hazard Index (1.0) Common SourcesFirefighting foam (AFFF), waterproof textiles, food packaging, and industrial discharge. | 0.003 | HI | µg/L | PFAS | Detected |
| PFMBA | ND | HI | µg/L | PFAS | Not Detected |
| PFMPA | ND | HI | µg/L | PFAS | Not Detected |
| PFNA PFNAPFAS A long-chain PFAS compound used in manufacturing fluoropolymers. It bioaccumulates in the body and is very persistent in the environment. Health EffectsDevelopmental effects, liver toxicity, immune suppression, and potential cancer risk. EPA LimitPart of Hazard Index (1.0) Common SourcesFluoropolymer manufacturing, industrial emissions, and contaminated water sources. | ND | HI | µg/L | PFAS | Not Detected |
| PFOA PFOAPFAS A long-chain PFAS ("forever chemical") once widely used in nonstick coatings and firefighting foam. It persists in the body and environment for years. Health EffectsLinked to kidney and testicular cancer, thyroid disease, elevated cholesterol, and reproductive issues. EPA Limit4.0 ppt MCL Common SourcesIndustrial discharge, firefighting foam (AFFF), nonstick cookware manufacturing, and contaminated groundwater. | ND | 0.004 | µg/L | PFAS | Not Detected |
| PFOS PFOSPFAS A long-chain PFAS compound historically used in stain-resistant coatings and firefighting foam. One of the most studied and persistent PFAS chemicals. Health EffectsLiver damage, immune system suppression, thyroid disruption, increased cholesterol, and potential cancer risk. EPA Limit4.0 ppt MCL Common SourcesFirefighting foam (AFFF), industrial sites, stain-resistant fabric treatments, and contaminated groundwater. | ND | 0.004 | µg/L | PFAS | Not Detected |
| PFPeA PFPeAPFAS A short-chain PFAS compound commonly detected in drinking water. One of the most frequently found PFAS in UCMR 5 monitoring. Health EffectsLess studied than PFOA/PFOS. Potential liver and thyroid effects. Research is ongoing. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial discharge, firefighting foam degradation, and consumer products. | ND | HI | µg/L | PFAS | Not Detected |
| PFPeS | ND | HI | µg/L | PFAS | Not Detected |
| PFTA | ND | HI | µg/L | PFAS | Not Detected |
| PFTrDA | ND | HI | µg/L | PFAS | Not Detected |
| PFUnA | ND | HI | µg/L | PFAS | Not Detected |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Yuma compares by contaminant
Explore where Yuma ranks among all Arizona cities for specific contaminants.
Water source & infrastructure
Where Yuma's water comes from
Yuma's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 156,943 people through 20 water systems.
Water bodies near Yuma
Yuma is located near 5 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Yuma
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CITY OF YUMA | AZ0414024 | 103,264 | SW |
| FOOTHILLS WATER AND SEWER LLC | AZ0414004 | 32,425 | SW |
| USMC YUMA MAIN SYSTEM | AZ0414082 | 6,324 | SW |
| Quechan Utility | 090400089 | 5,660 | GW |
| ASPC YUMA | AZ0414099 | 4,197 | GW |
| HOWARD CANTONMENT AREA | AZ0414403 | 1,500 | GW |
| SIERRA PACIFIC MOBILE MANOR | AZ0414098 | 816 | GW |
| CS TIERRA MESA ESTATES WATER COMPANY | AZ0414080 | 632 | GW |
| LAGUNA MOBILE HOME AND RV PARK | AZ0414322 | 450 | GW |
| CS EL PRADO WATER COMPANY | AZ0414442 | 404 | GW |
| FISHERS LANDING RESORT | AZ0414039 | 402 | SW |
| LOST TRAVELER RV PARK | AZ0414095 | 200 | GW |
| SUN LEISURE ESTATES IMPROVEMENT DISTRICT | AZ0414075 | 143 | GW |
| CS RANCHEROS BONITOS WATER COMPANY | AZ0414073 | 120 | GW |
| CS GREEN ACRES WATER COMPANY | AZ0414065 | 105 | GW |
| G & L MOBILE PARK | AZ0414463 | 90 | GW |
| MOUNTAIN VIEW MOBILE VILLAGE | AZ0414432 | 75 | GW |
| RIVER RV RANCH | AZ0414086 | 71 | GW |
| JONES COOP WATER ASSOC | AZ0414070 | 35 | GW |
| YUMA WEST MHP | AZ0414391 | 30 | GW |
How Yuma compares
Full Arizona rankings →Yuma's score of 36.1/100 is below the average of 42/100 among major Arizona cities. It outscores 1 of 10 nearby cities. 9 of 10 nearby cities score higher.
Nearby cities
View Arizona rankings →ZIP codes served by Yuma
The water systems serving Yuma cover 1 ZIP code. Select any ZIP to see which water systems serve that area.
About Yuma, AZ
Learn more about your water
Guides and resources related to Yuma's water quality findings.
Explore water quality across Yuma
Frequently asked questions
Is Yuma, AZ tap water safe to drink?
Yuma's water quality earned a grade of F (36.1/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #287 out of 292 cities tested in Arizona.
What contaminants are in Yuma's water?
Lead was measured at 6.1 ppb (90th percentile). 2 PFAS compounds were detected. 4943 violations are on record.
How is Yuma's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Yuma?
While lead levels are within EPA limits, a filter adds extra protection. PFAS compounds have been detected. A filter with activated carbon can help reduce exposure.
Where does Yuma's water come from?
Yuma's water is sourced from Surface water. The city has 20 water systems serving approximately 156,943 residents.
What health violations has Yuma's water system had?
Yuma has 318 health-based violations on record. The most recent violation was recorded in December 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 779 violations remain unresolved.
How does Yuma's water compare to other cities?
Yuma ranks #287 out of 292 cities in Arizona (better than 2% of state cities) and #15486 out of 15744 cities nationally (2th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.