How many water violations are in Kootenai County?

Kootenai County has 7,546 total drinking water violations across 195 water systems, of which 1,230 are health-based violations. 94.4% of systems have at least one violation.

How many people get water from Kootenai County systems?

Water systems in Kootenai County serve approximately 178,648 people through 195 public water systems.

Has PFAS been detected in Kootenai County water?

Under EPA UCMR5, 1 of 8 tested systems in Kootenai County had at least one PFAS detection (12.5% of the UCMR5-tested subset - not of all 195 SDWIS systems).

What types of water sources supply Kootenai County?

Water systems in Kootenai County use GW (186 systems), SW (9 systems) as their primary water sources.

Are health-based violations serious?

Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 16.3% of Kootenai County's violations are health-based. Among counties with any SDWIS violations, this extract puts Kootenai County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

Where does Kootenai County sit among U.S. counties for water-system population?

According to EPA SDWIS county population served used on /counties, Kootenai County ranks #370 of 3,254 counties by people served, and #3 of 44 counties in Idaho. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Idaho

Kootenai County, Idaho

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet ID055 · Kootenai County 195 sys · 7,546 viol · #370/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-LOW · SRC-GW · SYS-LARGE · BOOK-FULL

VIOL-SEVERE 94.4% flagged
HEALTH-LOW 16.3% health
RANK-TOP #370/3254
PHOTO-FINISH ±0.2 pp
PFAS-LOW 12.5% detect
SRC-GW GW lead 95%
SYS-LARGE 195 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Gem County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Kootenai County ranks #370 of 3,254 counties by people served, and #3 of 44 counties in Idaho. See methodology · corpus placement.

Kootenai County standing, mid-flagged corpus third

Flagged-system rate 94.4% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 16.3% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 12.5% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #370 of 3,254 · #3 of 44 in Idaho.

Water Systems

System Name	Population	Violations	PFAS
Coeur D Alene City Of	54,115	90	Clean
Post Falls City Of	20,285	658	Clean
East Greenacres Irrigation Dist	11,165	33	Clean
Rathdrum City Of	10,358	26	Detected
Hayden Lake Irrigation Dist	9,375	34	Clean
Ross Point Water Dist	8,965	7	Clean
Avondale Irrigation Dist	8,785	49	Clean
Hillside Service Area	4,140	72	-
Silverwood	3,930	88	-
Rimrock Service Area	3,493	31	-
Spirit Lake City Of	2,825	32	-
Dalton Water Assn Inc	2,598	24	-
Twin Lakes Service Area	2,023	17	-
Idpr Farragut State Park	2,000	4	-
Hauser Lake Water Assn Inc	1,350	47	-
Huetter Poe Itd	1,200	50	-
Hayden Pines Grouse Meadows	1,188	9	-
Bayview Water and Sewer Dist	1,175	36	-
Remington Rec Water Dist	1,104	8	-
Black Rock Utilities Inc	1,014	34	-
Athol City Of	990	21	-
Greenferry Water & Sewer District	978	12	-
Gem State - Spirit Lake East	843	34	-
Kootenai County Water Dist 1	843	123	-
Gem State - Bar Circle S Ranch	633	41	-
Real Life Ministries North	600	0	-
Worley City Of	591	71	-
Chilco Service Area	563	12	-
Pine Villa Park and Water Assn	500	63	-
Emerald Estates Water Assn Inc	485	39	-
Holiday Acres Water Assn	480	97	-
Gozzer Ranch	470	47	-
Cave Bay Community System	458	107	-
Harrison City Of	456	132	-
Pineview Estates Water Dist	450	8	-
New Life Community Church	450	34	-
Lone Mountain Estates	448	0	-
Mountain View Terrace	445	8	-
Gem State - Bitterroot Water Company	428	22	-
Garwood Water Coop	398	29	-
Leisure Park	381	14	-
Troy Hoffman Water Corp	367	9	-
Harbor View Estates Water & Sewer Dist	355	6	-
Conkling Park Water Assn	309	29	-
Rose Lake Water Assn	300	133	-
Elkhorn Ranch	278	4	-
Lost Creek Estates Water	277	0	-
Chateaux Water Assn Inc	275	26	-
Royal Highland Water System	275	8	-
Arrow Point Park	275	29	-

Compare beyond Idaho

Mid-flagged peers for Kootenai County

Cross-state counties nearest Kootenai County on flagged-system share (94.4%) and cumulative violation count (7,546). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.