Short answer: No measured result is above a legal limit; lithium sits above a screening level. Tucson City of serves 732,906 residents.
This report uses the largest, City of Tucson (Tucson Water). Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
TUCSON CITY OF (EPA PWSID AZ0410112) delivers groundwater to 732,906 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
lead 0.65 µg/L, below the 15 µg/L action level (detected below the limit); 341 galvanized lines to replace (context, not a tap measurement)
PFBA 8.1 ng/L detected (no federal or state limit)
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Each card names which Tucson findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
By the federal data, Tucson Water performs well: the 2024 UCMR5 round found the two regulated forever chemicals (PFOA and PFOS) not detected across 83 sites, and the latest lead 90th-percentile was 0.65 µg/L — about 23 times below the action level. Two everyday measures, water hardness and disinfectant type, come from the utility's own report and are not yet on file, so we mark them pending rather than guess.
In the 2024 federal UCMR5 monitoring of delivered water, PFOA and PFOS were not detected in any sample, and 27 of 29 PFAS compounds were never detected. One short-chain PFAS (PFBA) was detected once at 8.1 ng/L; it has no federal limit. Note: this reflects treated, delivered water — Tucson's aquifer has a documented PFAS history that the utility manages before delivery.
The 90th-percentile tap sample for 2021–2023 was 0.65 µg/L, far below the 15 µg/L action level and declining since 1992. There is no safe level of lead, so homes with pre-1986 plumbing may still choose an NSF/ANSI 53 lead-certified filter.
These two are not in the federal datasets — they're published in Tucson Water's annual Water Quality Report. We haven't sourced that document yet, so both are marked pending. We don't publish a number until we can cite it.
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| Contaminant | Result | Benchmark | Sampled | Source |
|---|---|---|---|---|
| Lithium | 63.7 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | 2024-01-10 to 2025-11-04 | UCMR5 Analytical Results: TUCSON CITY OF (AZ0410112) |
| Lead (90th percentile) | 0.649 µg/L | 15 µg/L federal action level | 2021–2023 monitoring period | Lead & Copper Rule 90th-percentile: TUCSON CITY OF (AZ0410112) |
| Perfluorobutanoic acid (PFBA) | 8.1 ng/L | No federal or state limit; shown for transparency | 2024-01-10 to 2025-11-04 | UCMR5 Analytical Results: TUCSON CITY OF (AZ0410112) |
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: TUCSON CITY OF (AZ0410112)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: TUCSON CITY OF (AZ0410112)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where City of Tucson (Tucson Water) reported something related, it's shown below.
Lead at City of Tucson (Tucson Water): 0.649 µg/L (90th percentile, 2021–2023 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.