How many water violations are in Coos County?

Coos County has 6,822 total drinking water violations across 47 water systems, of which 856 are health-based violations. 100.0% of systems have at least one violation.

How many people get water from Coos County systems?

Water systems in Coos County serve approximately 51,546 people through 47 public water systems.

Has PFAS been detected in Coos County water?

Under EPA UCMR5, 0 of 3 tested systems in Coos County had at least one PFAS detection (0.0% of the UCMR5-tested subset - not of all 47 SDWIS systems).

What types of water sources supply Coos County?

Water systems in Coos County use GW (27 systems), SW (20 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. 12.5% of Coos County's violations are health-based. Among counties with any SDWIS violations, this extract puts Coos County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

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

According to EPA SDWIS county population served used on /counties, Coos County ranks #939 of 3,254 counties by people served, and #17 of 36 counties in Oregon. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Oregon

Coos County, Oregon

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet OR011 · Coos County 47 sys · 6,822 viol · #939/3254

VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL

VIOL-SEVERE 100.0% flagged
HEALTH-LOW 12.5% health
RANK-UPPER #939/3254
PHOTO-FINISH ±0.0 pp
PFAS-CLEAN 0.0% detect
SRC-GW GW lead 57%
SYS-MID 47 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Multnomah County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Coos County ranks #939 of 3,254 counties by people served, and #17 of 36 counties in Oregon. See methodology · corpus placement.

Coos County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 12.5% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #939 of 3,254 · #17 of 36 in Oregon.

Water Systems

System Name	Population	Violations	PFAS
Coos Bay North Bend Wtr Brd	34,500	20	Clean
Coquille, City Of	3,953	265	Clean
Bandon, City Of	3,000	95	Clean
Myrtle Point, City Of	2,656	104	-
Lakeside Water District	1,800	58	-
Oprd Bullards Beach State Pk	1,400	26	-
Powers, City Of	712	438	-
Shelley Road-Crest Acres WD	430	60	-
Rink Creek Water District	285	99	-
Sheep Ranch Golf	235	3	-
Bandon Coastal Dunes	225	121	-
Bandon Christian Fellowship	200	47	-
Riverview Christian Fellowship	164	8	-
Bridge Water District	150	277	-
Coos Bay Speedway	150	38	-
Bandon by the Sea RV West	100	9	-
Arago Community Church	90	78	-
Garden Valley Water Association	84	222	-
Myrtle Point Kingdom Hall	80	236	-
Dean Minard Water District	75	56	-
Camp Myrtlewood	75	215	-
Bandon Crossings Gc - Snack Shack	75	15	-
Camp Bradley	70	41	-
North Bayside Estates-North	65	137	-
Sand-N-Wood Mobile Villa	60	61	-
Mt Terrace MHP	60	711	-
Bandon by the Sea RV	60	88	-
Bandon Crossings Gc Cypress	60	1	-
Coquille River RV Park	55	93	-
South Slough Reserve	55	10	-
Sumner Water Corporation	50	650	-
Ocean Pines Park	50	383	-
Country Club Estates WD	45	92	-
North Bayside Estates-South	40	118	-
Remote Outpost	40	45	-
Coos Co Pks - Laverne	40	210	-
Coos Co Pks - West Laverne	40	100	-
Pacific Community Church	40	108	-
Camp Remote	40	64	-
Weiss Estates Water System	36	888	-
Heritage Hills Homeowners Assn	34	4	-
Coquille Valley Elks-Bpoe 1935	33	44	-
Coos Golf Club	30	197	-
Watsonville Water System	27	167	-
Robbins Nest Residential Park	27	41	-
Beach Loop RV Park	25	39	-
2 Mile Bistro	25	40	-

Compare beyond Oregon

Mid-flagged peers for Coos County

Cross-state counties nearest Coos County on flagged-system share (100.0%) and cumulative violation count (6,822). 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.