No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting January 2021.
Serves about 7,500 people (1,053 connections) with groundwater from its own wells.
From EPA's record for ID4200054. PurityMap is independent of Mountain Home Air Force Base.
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14 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2021 | Nitrate | 11 mg/L | 10 mg/L | Resolved |
| From October 2020 | Nitrate | 14 mg/L | 10 mg/L | Resolved |
| From July 2020 | Nitrate | 29 mg/L | 10 mg/L | Resolved |
| From April 2020 | Nitrate | 25 mg/L | 10 mg/L | Resolved |
| From April 2020 | Nitrate | 12 mg/L | 10 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2020 | Nitrate | 11 mg/L | 10 mg/L | Resolved |
| From October 2019 | Nitrate | 15 mg/L | 10 mg/L | Resolved |
| From July 2019 | Nitrate | 27 mg/L | 10 mg/L | Resolved |
| From July 2019 | Nitrate | 27 mg/L | 10 mg/L | Resolved |
| From October 2018 | Nitrate | 17 mg/L | 10 mg/L | Resolved |
| From July 2018 | Nitrate | 18 mg/L | 10 mg/L | Resolved |
| From October 2017 | Nitrate | 17 mg/L | 10 mg/L | Resolved |
| From July 2017 | Nitrate | 11 mg/L | 10 mg/L | Resolved |
| From October 2016 | Nitrate | 11 mg/L | 10 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from April 2023 to December 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanesulfonic acid (PFHxS) | 10 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorobutanesulfonic acid (PFBS) | 4.8 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 | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorohexanoic acid (PFHxA) | 13 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoropentanoic acid (PFPeA) | 6.7 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| 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 | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| 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 | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| 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 | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| 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 | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| 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 | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-12-06 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-12-06 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-12-06 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-12-06 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-18 to 2023-10-25 | UCMR5 Analytical Results: MOUNTAIN HOME AIR FORCE BASE (ID4200054) |
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
Turnaround: 5 minutes
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
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
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.
Get PurityMap updates about this water system.
Follow this water →Mountain Home Air Force Base's phone number on EPA record is 208-828-1761. Its mailing address is 366 CES/CEIE, 1030 Liberator St., MOUNTAIN HOME AFB, ID 83648.
According to EPA's record, Mountain Home Air Force Base uses groundwater from its own wells.
EPA's record shows 14 health-based violations for Mountain Home Air Force Base in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting January 2021. EPA also lists 163 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Mountain Home Air Force Base's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Mountain Home Air Force Base. Its phone number on EPA record is 208-828-1761. Its mailing address on EPA record is 366 CES/CEIE, 1030 Liberator St., MOUNTAIN HOME AFB, ID 83648. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.