Casa Grande, AZ · PFAS · forever chemicals
Is There PFAS in Casa Grande Tap Water?
Casa Grande, AZ: PFHxS 6.1 ng/L detected, below EPA's 10 ng/L limit, in 2024 testing. Every PFAS result and filter certifications per compound.
The measurements · EPA UCMR 5
6 of 29 PFAS detected
Each result is read against its own reference. Only PFHxS has a federal limit. PFBA, PFHpA and PFPeA have no federal or state limit and are shown for transparency, not graded.
- PFHxSFederal MCLPerfluorohexanesulfonic acid6.1ng/LDetected, below its limit · limit under EPA review · sampled 2024-08-13 to 2025-02-12Evidence
- PFBSEPA health advisoryPerfluorobutanesulfonic acid91.1ng/LDetected, below its EPA health advisory · sampled 2024-08-13 to 2025-02-12Evidence
- PFHxAState MCL · MichiganPerfluorohexanoic acid18.6ng/LDetected, below its state limit · sampled 2024-08-13 to 2025-02-12Evidence
- PFPeANo limitPerfluoropentanoic acid20.8ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-08-13 to 2025-02-12Evidence - PFBANo limitPerfluorobutanoic acid19.9ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-08-13 to 2025-02-12Evidence - PFHpANo limitPerfluoroheptanoic acid9.4ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-08-13 to 2025-02-12Evidence
All 29 compounds in this record
- PFOAMCLNot detected
- PFOSMCLNot detected
- PFHxSMCL6.1 ng/L
- PFNAMCLNot detected
- HFPO-DA (GenX)MCLNot detected
- PFBS91.1 ng/L
- PFHxA18.6 ng/L
- PFBA19.9 ng/L
- PFHpA9.4 ng/L
- PFPeA20.8 ng/L
- 11Cl-PF3OUdSNot detected
- 4:2 FTSNot detected
- 6:2 FTSNot detected
- 8:2 FTSNot detected
- 9Cl-PF3ONSNot detected
- ADONANot detected
- NEtFOSAANot detected
- NFDHANot detected
- NMeFOSAANot detected
- PFDANot detected
- PFDoANot detected
- PFEESANot detected
- PFHpSNot detected
- PFMBANot detected
- PFMPANot detected
- PFPeSNot detected
- PFTANot detected
- PFTrDANot detected
- PFUnANot detected
MCL marks the 5 PFAS given a federal limit in EPA's 2024 rule. EPA has proposed rescinding three of those limits; they apply until a final rule.
Results as a table29 results with limit, status, sample date and source
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanesulfonic acid (PFHxS) | 6.1 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorobutanesulfonic acid (PFBS) | 91.1 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorohexanoic acid (PFHxA) | 18.6 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorobutanoic acid (PFBA) | 19.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoroheptanoic acid (PFHpA) | 9.4 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoropentanoic acid (PFPeA) | 20.8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-13 to 2025-02-12 | UCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009) |
How this compares
PFOS across 764 cities with a detected value
4 ng/L federal MCL (2024)
3,396 more were below the lab's 4 ng/L reporting limit and aren't plotted, and 34 have no result on record. 66 cities above 25 ng/L are grouped in the last bar. A position here is not a verdict on the water.
Where Casa Grande sitsNot on the stripCasa Grande’s PFOS result was below the lab’s reporting limit.
What this record covers
- ARIZONA WATER CO - PINAL VALLEY's water system as a whole, as reported to EPA UCMR 5.
- 29 PFAS compounds, each with its own result.
- Samples taken 2024-08-13 to 2025-02-12.
What is unknown
- The water at your tap. Building plumbing isn't in this record.
- PFAS not listed in the 29 above were not reported in these records.
- Levels since the last sample have not been published.
Treatment capabilities that apply
Test first, then match a certified method.
A tap test can confirm levels at your home before you choose treatment.
Identified concerns
- PFBS · detected below the limit
- PFHxA · detected below the limit
- PFHxS · detected below the limit
- PFBA · detected, no federal or state limit
- PFHpA · detected, no federal or state limit
- PFPeA · detected, no federal or state limit
- Reverse osmosisOpen the method →
- Activated carbon (GAC)Open the method →
- Anion exchangeOpen the method →
No product in our catalogue has verified certification for these concerns yet.See PFAS filters, checked compound by compound ↓
Commercial · PFAS filters
PFAS filters
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.
- Browse, not a match:
- Clearly Filtered Pitcher (lab-tested, not NSF 53 certified)
A tap test first tells you which PFAS reach your glass.
Questions
Frequently asked
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Is there PFAS in Casa Grande tap water?
In EPA's UCMR 5 testing of ARIZONA WATER CO - PINAL VALLEY (2024-08-13 to 2025-02-12): PFBA 19.9 ng/L (no federal or state limit), PFBS 91.1 ng/L (EPA health advisory 2,000), PFHpA 9.4 ng/L (no federal or state limit), PFHxA 18.6 ng/L (state limit 400,000), PFHxS 6.1 ng/L (limit 10), PFPeA 20.8 ng/L (no federal or state limit) and the other 23 PFAS tested not detected. "Not detected" means below the lab's reporting limit, not proven zero.
What are the federal PFAS limits?
EPA's 2024 drinking-water rule set maximum contaminant levels of 4.0 ng/L for PFOA and for PFOS, and 10 ng/L for PFHxS, PFNA and HFPO-DA (GenX). In May 2026 EPA proposed keeping the PFOA and PFOS limits, with the option of until 2031 to comply, and rescinding the other three. Until a final rule, all five limits apply. Results above them today are above the limits in force.
How do I remove PFAS from my tap water?
Reverse-osmosis systems and filters certified to NSF/ANSI 53 or 58 for PFOA/PFOS reduction are the proven options at the tap. Check the certifier's listing (NSF, WQA or IAPMO) for the exact model, and replace cartridges on schedule.
- UCMR5 Analytical ResultsUCMR5 Analytical Results: ARIZONA WATER CO - PINAL VALLEY (AZ0411009)US EPA · 2026-01-15View source ↗
- State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: ARIZONA WATER CO - PINAL VALLEY (AZ0411009)US EPA SDWIS · 2026-07-09View source ↗