City of Mountain Home

Published drinking-water records and contacts for City of Mountain Home. System ID4200032. Review sources and dates; not a real-time water assessment.

System ID: ID4200032
State or territory: ID
Published population served: 14651
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 540 — 2023-11-28 – 2025-10-17
Lead and copper monitoring summaries: 16 — 1992-07-01 – 2025-12-31
Idaho selected chemical sample panels: 8 — 2026-08-26 – 2026-08-26

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
Substance	Published result	Reporting limit	Sample date	Sampling location
11Cl-PF3OUdS	< 0.005 µg/L	0.005 µg/L	2025-10-17	Well #15 Treatment / 13210TP
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2025-10-17	Well #15 Treatment / 13210TP
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2025-10-17	Well #15 Treatment / 13210TP
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2025-10-17	Well #15 Treatment / 13210TP
ADONA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2025-10-17	Well #15 Treatment / 13210TP
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2025-10-17	Well #15 Treatment / 13210TP
NFDHA	< 0.02 µg/L	0.02 µg/L	2025-10-17	Well #15 Treatment / 13210TP
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFBA	< 0.005 µg/L	0.005 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFBS	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFDA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFDoA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFEESA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFHpA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFHpS	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFHxA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFHxS	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFMBA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFMPA	< 0.004 µg/L	0.004 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFNA	< 0.004 µg/L	0.004 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFOA	< 0.004 µg/L	0.004 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFOS	< 0.004 µg/L	0.004 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFPeA	< 0.003 µg/L	0.003 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFPeS	< 0.004 µg/L	0.004 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFTA	< 0.008 µg/L	0.008 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFTrDA	< 0.007 µg/L	0.007 µg/L	2025-10-17	Well #15 Treatment / 13210TP
PFUnA	< 0.002 µg/L	0.002 µg/L	2025-10-17	Well #15 Treatment / 13210TP
lithium	< 9 µg/L	9 µg/L	2025-10-17	Well #15 Treatment / 13210TP

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
Substance	Published 90th percentile	Monitoring period	Source quarter
Lead (PB90)	0 mg/L	2023-01-01 – 2025-12-31	2026Q3
Lead (PB90)	0 mg/L	2022-07-01 – 2022-12-31	2026Q3
Lead (PB90)	0 mg/L	2022-01-01 – 2022-06-30	2026Q3
Lead (PB90)	0 mg/L	2019-01-01 – 2021-12-31	2026Q3
Lead (PB90)	0 mg/L	2016-01-01 – 2018-12-31	2026Q3
Lead (PB90)	0 mg/L	2013-01-01 – 2015-12-31	2026Q3
Lead (PB90)	0.005 mg/L	2010-01-01 – 2012-12-31	2026Q3
Lead (PB90)	0 mg/L	2007-01-01 – 2009-12-31	2026Q3

Twelve most recent imported state laboratory records
Substance	Published result	Sample date	Location / source
NITRATE	0.9 mg/L	2026-08-26	WELL 1 / Idaho selected chemical sample panels
NITRATE	1.0 mg/L	2026-08-26	WELL 9 / Idaho selected chemical sample panels
NITRATE	2.3 mg/L	2026-08-26	WELL 11 / Idaho selected chemical sample panels
NITRATE	1.1 mg/L	2026-08-26	WELL 12 / Idaho selected chemical sample panels
NITRATE	1.5 mg/L	2026-08-26	WELL 13 / Idaho selected chemical sample panels
NITRATE	0.8 mg/L	2026-08-26	WELL 14 / Idaho selected chemical sample panels
NITRATE	0.7 mg/L	2026-08-26	WELL 15 / Idaho selected chemical sample panels
NITRATE	1.7 mg/L	2026-08-26	WELL #16 / Idaho selected chemical sample panels

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

162 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / record	Period	Recorded status	Health-based (EPA classification)	Source quarter
Ground Water Rule / Failure to Conduct Assessment Monitoring	2026-06-01 – 2026-06-30	Archived	No	2026Q3
Revised Total Coliform Rule / Treatment Technique, Level 1 Assessment (RTCR)	2025-08-01 – —	Resolved	Yes	2026Q3
Lead and Copper Rule Revisions / LSL Inventory	2024-10-17 – —	Resolved	Yes	2026Q3
Lead and Copper Rule Revisions / LSL Reporting	2024-10-17 – —	Resolved	No	2026Q3
Ground Water Rule / Monitoring, Source Water (GWR)	2024-09-30 – —	Unaddressed	No	2026Q3
Ground Water Rule / Monitoring, Source Water (GWR)	2024-07-22 – —	Unaddressed	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2023-01-01 – 2025-12-31	Archived	No	2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
Idaho selected chemical sample panels — last successful check: 2026-10-12

Administrative contact (EPA filing)

Sonnentag, David: 208-587-2108

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records