Tucson, Arizona Water Quality Report
Water quality data for 153 water systems serving 901,023 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 228.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 2280% | Above guideline |
| PFBA | 0.023 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.008 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.012 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.015 | 0.010 ug/L | 0.001 ug/L(EWG) | 150% | Above limit |
| PFOA | 0.005 | 0.004 ug/L | 0.090 ug/L(EWG) | 125% | Above limit |
| PFOS | 0.023 | 0.004 ug/L | 0.300 ug/L(EWG) | 575% | Above limit |
| PFPeA | 0.016 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (71)
45
Aug 19, 2025
75
Aug 7, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
51
Jul 1, 2025
75
May 25, 2025
75
May 15, 2025
75
Apr 11, 2025
75
Apr 11, 2025
76
Apr 2, 2025
45
Mar 16, 2025
45
Mar 16, 2025
66
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
52
Jan 1, 2025
52
Jan 1, 2025
75
Dec 20, 2024
75
Dec 20, 2024
75
Dec 20, 2024
75
Dec 20, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
75
Oct 2, 2024
52
Oct 1, 2024
52
Oct 1, 2024
35
Sep 29, 2024
35
Sep 29, 2024
35
Sep 29, 2024
75
Jul 12, 2024
35
Jun 30, 2024
75
Jun 30, 2024
35
Jun 30, 2024
35
Mar 31, 2024
35
Mar 31, 2024
35
Mar 31, 2024
75
Mar 3, 2024
66
Jan 1, 2024
45
Sep 21, 2023
Resolved Violations (929)
3A
Sep 1, 2025 — Sep 30, 2025
27
Sep 1, 2025 — Sep 30, 2025
3A
Sep 1, 2025 — Sep 30, 2025
3A
Sep 1, 2025 — Sep 30, 2025
3A
Sep 1, 2025 — Sep 30, 2025
+ 924 more resolved violations
Frequently Asked Questions
Is Tucson tap water safe to drink?
Tucson's water has 3 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Tucson tap water?
8 contaminants have been detected in Tucson's water supply across 153 water systems. See the full contaminant table above for details.
How can I improve my water quality in Tucson?
Install a water filter rated for the specific contaminants found in Tucson's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Tucson have any water quality violations?
Yes, Tucson currently has 1278 active violations. See the violations section above for details.