EPA UCMR 5 Data · Arizona

PFAS Drinking-Water Monitoring Results in Arizona

This page summarizes EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5, 2023–2025) drinking-water monitoring records linked to ZIP codes in Arizona, as processed for the PFAS Estimator national dataset. Data updated: July 2026.

20.3% of Arizona ZIP codes in this dataset (276 total)
had at least one regulated PFAS compound detected at or above its applicable EPA threshold (56 of 276 ZIP codes). Of those, 46 (82.1%) had more than one compound at or above threshold. This dataset includes only ZIP codes with at least one recorded PFAS detection; ZIP codes where all compounds returned non-detect are not represented.

Compounds detected in Arizona

Detection prevalence, exceedance, and concentration by compound, Arizona ZIP codes in the EPA UCMR 5 analytic dataset.
Compound Applicable threshold ZIP codes detected At/above threshold Mean detected Maximum detected
PFOA0.004 µg/L (MCL)47 (17.0% of state)47 (100.0%) — all detections at/above limit by construction0.0131 µg/L0.0409 µg/L
PFOS0.004 µg/L (MCL)48 (17.4% of state)48 (100.0%) — all detections at/above limit by construction0.0181 µg/L0.0558 µg/L
PFHxS0.01 µg/L (MCL)63 (22.8% of state)23 (36.5% of detected)0.0164 µg/L0.0705 µg/L
PFNA0.01 µg/L (MCL)1 (0.4% of state)0 (0.0% of detected)0.0043 µg/L0.0043 µg/L
PFBS2.0 µg/L (HI reference)168 (60.9% of state)not calculated¹0.0196 µg/L0.144 µg/L
Lithium7.36 µg/L (reference, not a regulatory limit)272 (98.6% of state)272 (100.0%) at/above reference161.1562 µg/L796.0 µg/L
PFPeA— (no federal limit)64 (23.2% of state)0.0132 µg/L0.059 µg/L
PFBA— (no federal limit)142 (51.4% of state)0.0077 µg/L0.032 µg/L
PFHpA— (no federal limit)24 (8.7% of state)0.0061 µg/L0.0132 µg/L
6:2 FTS— (no federal limit)1 (0.4% of state)0.0051 µg/L0.0051 µg/L
PFDA— (no federal limit)1 (0.4% of state)0.0035 µg/L0.0035 µg/L

ZIP codes in this dataset (Arizona)

276 ZIP codes with at least one recorded PFAS detection. Click a ZIP code to view its full compound-level results.

Per-ZIP-code detection summary for Arizona
ZIP code Compounds detected At/above threshold
850013No
850033No
850043No
850053No
850063No
850073No
850083No
850093No
850123No
850133No
850143No
850153No
850163No
850173No
850183No
850193No
850203No
850213No
850223No
850233No
850243No
850273No
850283No
850293No
850313No
850323No
850333No
850343No
850353No
850363No
850373No
850403No
850413No
850423No
850433No
850443No
850453No
850483No
850503No
850513No
850533No
850543No
850583No
850833No
850853No
850863No
850873No
850983No
851191No
851201No
851226No
851281No
851311No
851327Yes (1)
851381No
851391No
851401No
851426Yes (2)
851431No
851471No
851721No
852013No
852023No
852033No
852043No
852053No
852067Yes (2)
852073No
852083No
852093No
852103No
852113No
852127Yes (2)
852133No
852143No
852153No
852244No
852254No
852264No
852336Yes (2)
852347Yes (2)
852366Yes (2)
852484No
852494No
852503No
852513No
852522No
852533No
852543No
852553No
852563No
852573No
852582No
852592No
852602No
852612No
852623No
852631No
852641No
852662No
852672No
852682No
852808Yes (3)
852818Yes (3)
852828Yes (3)
852838Yes (3)
852848Yes (3)
852864No
852888Yes (3)
852956Yes (2)
852966Yes (2)
852976Yes (2)
852986Yes (2)
852996Yes (2)
853012No
853022No
853032No
853043No
853053No
853062No
853078Yes (3)
853083No
853098Yes (3)
853103No
853211No
853238Yes (2)
853261No
853313No
853354Yes (1)
853361No
853371No
853387Yes (2)
853393No
853408Yes (3)
853441No
853454Yes (1)
853491No
853501No
853511No
853538Yes (2)
853551No
853611No
853631No
853641No
853651No
853671No
853692No
853711No
853731No
853741No
853751No
853772No
853784Yes (1)
853791No
853814Yes (1)
853824Yes (1)
853834Yes (1)
853871No
853881No
853901No
853928Yes (3)
853958Yes (3)
853962No
855015Yes (2)
855302No
855325Yes (2)
855396Yes (2)
855403No
855419Yes (3)
855422No
855442No
855463No
855502No
855513No
855523No
856021No
856035Yes (1)
856071No
856136Yes (3)
856144Yes (1)
856211No
856221No
856231No
856261No
856291No
856311No
856341No
856352No
856412No
856431No
856487Yes (3)
856502No
856536Yes (3)
856587Yes (3)
857012No
857044No
857057Yes (2)
857062No
857072No
857102No
857112No
857122No
857132No
857142No
857152No
857162No
857182No
857193No
857302No
857352No
857362No
857373No
857392No
857415Yes (2)
857425Yes (2)
857436Yes (2)
857452No
857462No
857472No
857482No
857492No
857502No
857552No
857562No
857572No
859011No
859111No
859241No
859252No
859292No
859301No
859353No
859361No
859371No
859411No
860011No
860041No
860051No
860111No
860215Yes (2)
860251No
860402No
860421No
863017Yes (2)
863037Yes (2)
863057Yes (2)
863137Yes (2)
863141No
863151No
863221No
863237Yes (2)
863241No
863262No
863271No
863351No
863368Yes (2)
863421No
863517Yes (2)
864011No
864021No
864032No
864042No
864052No
864062No
864091No
864121No
864131No
864263No
864295Yes (1)
864311No
864361No
864371No
864403No
864426Yes (2)
865044No
865051No

Methodology & limitations

Results are based on EPA UCMR 5 monitoring data (2023–2025), linked to ZIP codes via Public Water System Identifier. Non-detections are not present in this analytic dataset. For each compound and ZIP code, the highest observed concentration across the monitoring period is retained; this characterizes the upper bound of observed drinking-water concentrations, not a long-term average or an individual exposure estimate. A single water system may serve multiple ZIP codes, so the same monitoring record can appear for more than one ZIP in this table. ZIP-code assignment reflects water-system service area geography and does not establish individual household exposure. Private wells are not represented unless served by a monitored public water system. PFOA and PFOS are reported by detection prevalence because the UCMR 5 reporting limit equals their federal MCL. A full PFBS Hazard Index is not calculated because co-located, same-event multi-compound readings are not retained in this dataset. Lithium has no federal Maximum Contaminant Level; 7.36 µg/L is an evidence-based reference concentration from a prospective cohort study, not a regulatory threshold.

Related links

PFAS Estimator homepage & national ZIP lookup
Full national methodology, limitations, and dataset documentation
All states & territories index

Data from the EPA Unregulated Contaminant Monitoring Rule (UCMR 5), 2023–2025. Detection does not indicate a health risk. Not medical advice. Data updated: July 2026. · EPA Source