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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
EPA records for CITY OF YUMA • Updated September 2026
Grade F — based on EPA compliance records, lead testing and PFAS monitoring
CITY OF YUMA has serious issues in EPA's records: repeated health-based violations, unresolved violations, PFAS above the federal limit or lead near the action level. We recommend filtering drinking water.
Yuma's tap water grades F on EPA's records. CITY OF YUMA has 7 health-based violations in the last five years. A certified filter matched to those issues is a sensible precaution.
Yuma grades F. EPA records 7 health-based violations for CITY OF YUMA in the last five years. The water is legal to drink, but a certified filter matched to these findings is a reasonable precaution.
CITY OF YUMA's most recent Lead and Copper Rule result (2022-01-01 to 2024-12-31) was 1.1 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 232 UCMR5 PFAS results for CITY OF YUMA (2023-04-12 to 2024-02-20) were at or above the reporting limit of roughly 3–5 ppt.
CITY OF YUMA has 84 violations on file since 2016: 7 health-based in the last five years and 7 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
CITY OF YUMA reports surface water as its primary source and serves about 103,264 people (EPA PWSID AZ0414024).
We recommend one. Check which contaminant the violations involved (table above) and choose a filter certified for it.
Want to know what's really in your Yuma tap water?
CITY OF YUMA has 7 health-based EPA violations in the last five years.
Tap Score certified lab · Amazon. We may earn a commission, at no extra cost to you.
CITY OF YUMA · SDWIS records since 2016 · 5-year window starts 2021-09-07
EPA records 7 health-based violations for this system in the last five years, all of which are marked resolved or archived. Health-based violations mean a contaminant exceeded its Maximum Contaminant Level (MCL) or a required treatment step was not met.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2022-03-01 → 2022-03-31 | Resolvedreturned 2022-03-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2022-02-01 → 2022-02-28 | Resolvedreturned 2022-02-28 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2022-01-01 → 2022-01-31 | Resolvedreturned 2022-01-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-12-01 → 2021-12-31 | Resolvedreturned 2021-12-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-11-01 → 2021-11-30 | Resolvedreturned 2021-11-30 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-10-01 → 2021-10-31 | Resolvedreturned 2021-10-31 |
| Treatment Technique Precursor RemovalCARBON, TOTAL | Treatment technique | 2021-10-01 → 2021-12-31 | Resolvedreturned 2021-12-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-09-01 → 2021-09-30 | Resolvedreturned 2021-09-30 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-08-01 → 2021-08-31 | Resolvedreturned 2021-08-31 |
| Non-Acute MRDLChlorine dioxide | Disinfectant level exceeded | 2021-08-01 → 2021-08-31 | Resolvedreturned 2021-08-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-07-01 → 2021-07-31 | Resolvedreturned 2021-07-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-06-01 → 2021-06-30 | Resolvedreturned 2021-06-30 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-05-01 → 2021-05-31 | Resolvedreturned 2021-05-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-04-01 → 2021-04-30 | Resolvedreturned 2021-04-30 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-03-01 → 2021-03-31 | Resolvedreturned 2021-03-31 |
| Acute Maximum Residual Disinfectant LevelChlorine dioxide | Disinfectant level exceeded | 2021-02-01 → 2021-02-28 | Resolvedreturned 2021-02-28 |
| Monitoring and Reporting (DBP)Chlorine dioxide | Monitoring & reporting | 2025-06-01 → 2025-06-30 | Resolvedreturned 2025-06-30 |
| Monitoring and Reporting (DBP)Chlorine dioxide | Monitoring & reporting | 2024-12-01 → 2024-12-31 | Resolvedreturned 2024-12-31 |
| Monitoring and Reporting (DBP)Chlorite | Monitoring & reporting | 2024-12-01 → 2024-12-31 | Resolvedreturned 2024-12-31 |
| Public Notification Violation for NPDWR ViolationPublic Notice | Other | 2022-03-01 | Resolvedreturned 2022-06-02 |
| Monitoring and Reporting (DBP)Chlorine dioxide | Monitoring & reporting | 2022-02-01 → 2022-02-28 | Resolvedreturned 2022-02-28 |
| Monitoring and Reporting (DBP)Chlorite | Monitoring & reporting | 2022-02-01 → 2022-02-28 | Resolvedreturned 2022-02-28 |
| Public Notification Violation for NPDWR ViolationPublic Notice | Other | 2022-02-01 | Resolvedreturned 2022-06-02 |
| Public Notification Violation for NPDWR ViolationPublic Notice | Other | 2022-01-01 | Resolvedreturned 2022-06-02 |
| Public Notification Violation for NPDWR ViolationPublic Notice | Other | 2021-12-01 | Resolvedreturned 2022-06-02 |
Showing 25 of 84 violations on file. Full record on EPA ECHO.
Source: ECHO SDWA bulk download (SDWA_VIOLATIONS_ENFORCEMENT.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
EPA Lead and Copper Rule 90th-percentile results reported by CITY OF YUMA
Well below the 15 ppb action level. In the most recent monitoring period on file (2022-01-01 to 2024-12-31), 90% of the homes CITY OF YUMA sampled had lead at or below 1.1 ppb.
EPA's action level is 15 ppb (dropping to 10 ppb under the 2024 Lead and Copper Rule Improvements). There is no safe level of lead; the 90th-percentile figure describes the system, not your tap — homes with lead service lines or pre-1986 plumbing can be higher.
| Monitoring period | Lead 90th percentile | vs 15 ppb action level |
|---|---|---|
| 2022-01-01 → 2024-12-31 | 1.1 ppb | Well below the 15 ppb action level |
| 2019-01-01 → 2021-12-31 | 0.79 ppb | Well below the 15 ppb action level |
| 2016-01-01 → 2018-12-31 | 1.1 ppb | Well below the 15 ppb action level |
| 2013-01-01 → 2015-12-31 | 0.81 ppb | Well below the 15 ppb action level |
| 2010-01-01 → 2012-12-31 | 0.5 ppb | Well below the 15 ppb action level |
| 2009-01-01 → 2011-12-31 | 0.73 ppb | Well below the 15 ppb action level |
| 2007-01-01 → 2009-12-31 | 0.73 ppb | Well below the 15 ppb action level |
| 2006-01-01 → 2008-12-31 | 0.75 ppb | Well below the 15 ppb action level |
| 2003-01-01 → 2005-12-31 | 1.4 ppb | Well below the 15 ppb action level |
| 2002-01-01 → 2004-12-31 | 1.3 ppb | Well below the 15 ppb action level |
| 2003-01-01 → 2003-12-31 | 1 ppb | Well below the 15 ppb action level |
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
EPA UCMR5 monitoring, 2023-04-12 to 2024-02-20 · 232 PFAS results at entry points to the distribution system
No PFAS detected. None of the 232 UCMR5 PFAS results for CITY OF YUMA were at or above the method reporting limit. Reporting limits are about 3–5 ppt, so “not detected” means below that threshold — not proven zero.
| Compound | Detects / samples | Max (ppt) | Reporting limit | EPA MCL |
|---|---|---|---|---|
| PFOA | 0 / 8 | < 4 | 4 ppt | 4 ppt |
| PFOS | 0 / 8 | < 4 | 4 ppt | 4 ppt |
| PFHxS | 0 / 8 | < 3 | 3 ppt | 10 ppt |
| PFNA | 0 / 8 | < 4 | 4 ppt | 10 ppt |
| HFPO-DA | 0 / 8 | < 5 | 5 ppt | 10 ppt |
| PFBS | 0 / 8 | < 3 | 3 ppt | hazard index only |
“< 4 ppt” means below the laboratory reporting limit, not zero. ppt = parts per trillion (ng/L). Results are for finished water leaving the treatment plant.
Lithium (also monitored under UCMR5, not a PFAS): detected in 8 of 8 samples, max 150 µg/L. There is no federal limit for lithium.
What PFAS are and how to remove them →
Source: UCMR5 occurrence data, EPA Data Summary July 2026 (UCMR5_All.txt)
EPA Six-Year Review 4 compliance samples for CITY OF YUMA · finished water only · dated data, released 2024
These are the regulated-contaminant samples CITY OF YUMA reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Total trihalomethanes (TTHM) is flagged below; the status column explains why. Treat this as history, not today's tap water.
| Contaminant | Samples | Average | Max | EPA limit | Status |
|---|---|---|---|---|---|
| Arsenic | 1716 detects | 1.947 µg/L | 3.9 µg/L | 10 µg/LMCL | Within MCL |
| Nitrate (as N) | 3327 detects | 0.219 mg/L | 0.34 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 17 | 0.412 mg/L | 0.53 mg/L | 4 mg/LMCL | Within MCL |
| Chromium (total) | 171 detects | 0.059 µg/L | 1 µg/L | 100 µg/LMCL | Within MCL |
| Uranium (combined) | 2 | 3.25 µg/L | 4 µg/L | 30 µg/LMCL | Within MCL |
| Radium-226/228 | 20 detects | 0 pCi/L | ND | 5 pCi/LMCL | Not detected |
| Gross alpha | 21 detects | 0.1 pCi/L | 0.2 pCi/L | 15 pCi/LMCL | Within MCL |
| Total trihalomethanes (TTHM) | 256255 detects | 50.453 µg/L | 110 µg/L | 80 µg/LMCL (LRAA) | 19 single samples over MCL; average within limit |
| Haloacetic acids (HAA5) | 256 | 11.282 µg/L | 21 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
| Lead (tap samples) | 31555 detects | 0.353 µg/L | 11 µg/L | 15 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
| Copper (tap samples) | 315309 detects | 28.954 µg/L | 440 µg/L | 1300 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
Averages count non-detects as zero. TTHM and HAA5 limits are locational running annual averages, so a single high sample is not a violation — we grade those on the average only. Lead and copper rows are individual tap samples and are shown for context; compliance (and our score) uses the 90th-percentile result above. LRAA = locational running annual average; ND = not detected.
Source: SYR4 Six-Year Review compliance monitoring data 2012–2019 (released 2024-03)
CITY OF YUMA · 34,540 service lines inventoried · Q2 2026 snapshot
CITY OF YUMA reports no confirmed lead service lines, but 16,386 lines (47%) have not yet been verified, so lead cannot be ruled out for those homes. Utilities must keep investigating unknown lines under EPA's Lead and Copper Rule Improvements.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID AZ0414024 · See all Arizona lead service lines. We may earn a commission from filters and test kits, at no extra cost to you.
Surface-water systems draw from rivers, lakes or reservoirs and must filter and disinfect, which is why disinfection byproducts (TTHM, HAA5) are the readings to watch.
How to test your tap water and the treatment options that actually fit Yuma homes
The most reliable way to know what is actually coming out of your tap is a certified mail-in lab test. City-wide EPA data (like the report above) reflects the water leaving the treatment plant, but contaminants such as lead and copper can be picked up from your own service line and household plumbing — so the water at your Yuma faucet can differ from the system average. A state-certified lab measures dozens of contaminants at once with results you can trust; you can also find one near you through the EPA's certified-lab list at epa.gov/dwlabcert. Hardware-store test strips are cheaper and instant, but they only screen for a few basics (chlorine, hardness, pH, and a rough lead pass/fail) and are far less accurate — treat them as a first look, not a diagnosis.
Match the treatment to what your test finds. Reverse osmosis (RO) removes the widest range of contaminants — lead, arsenic, nitrate, PFAS, and dissolved solids — which makes an under-sink reverse osmosis system the most thorough choice for Yuma households with heavy-metal or PFAS concerns. If your main issue is taste, odor, or chlorine, an activated carbon filter (pitcher, faucet, or under-sink) is simpler and cheaper and handles chlorine and many organic compounds well, though carbon alone does not remove arsenic, nitrate, or most PFAS. NSF-certified pitchers rated for lead reduction are the easiest way to start today while you decide on a permanent setup.
We may earn a commission from testing kits and filters purchased through these links, at no extra cost to you.
Yuma ranks #35 of 37 graded Arizona cities.
Yuma grades F. EPA records 7 health-based violations for CITY OF YUMA in the last five years. The water is legal to drink, but a certified filter matched to these findings is a reasonable precaution.
CITY OF YUMA's most recent Lead and Copper Rule result (2022-01-01 to 2024-12-31) was 1.1 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 232 UCMR5 PFAS results for CITY OF YUMA (2023-04-12 to 2024-02-20) were at or above the reporting limit of roughly 3–5 ppt.
CITY OF YUMA has 84 violations on file since 2016: 7 health-based in the last five years and 7 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
CITY OF YUMA reports surface water as its primary source and serves about 103,264 people (EPA PWSID AZ0414024).
We recommend one. Check which contaminant the violations involved (table above) and choose a filter certified for it.
CITY OF YUMA has 7 health-based EPA violations in the last five years.
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