How many water violations are in Island?

Island has 25,141 total drinking water violations across 308 water systems, of which 1,522 are health-based violations. 97.7% of systems have at least one violation.

How many people get water from Island systems?

Water systems in Island serve approximately 104,049 people through 308 public water systems.

Has PFAS been detected in Island water?

Under EPA UCMR5, 1 of 5 tested systems in Island had at least one PFAS detection (20.0% of the UCMR5-tested subset - not of all 308 SDWIS systems).

What types of water sources supply Island?

Water systems in Island use GW (305 systems), SW (3 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. 6.1% of Island's violations are health-based. Among counties with any SDWIS violations, this extract puts Island in the lower health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

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

According to EPA SDWIS county population served used on /counties, Island ranks #555 of 3,254 counties by people served, and #16 of 39 counties in Washington. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Washington

Island, Washington

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet WA029 · Island 308 sys · 25,141 viol · #555/3254

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

VIOL-SEVERE 97.7% flagged
HEALTH-LOW 6.1% health
RANK-TOP #555/3254
PHOTO-FINISH ±0.0 pp
PFAS-LOW 20.0% detect
SRC-GW GW lead 99%
SYS-LARGE 308 systems
BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Island ranks #555 of 3,254 counties by people served, and #16 of 39 counties in Washington. See methodology · corpus placement.

Island standing, mid-flagged corpus third

Flagged-system rate 97.7% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 6.1% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 20.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #555 of 3,254 · #16 of 39 in Washington.

Water Systems

System Name	Population	Violations	PFAS
Oak Harbor City Of	23,767	13	Clean
Naval Air Station/Whidbey Island	16,595	10	Clean
Coupeville Town Of	4,077	104	Detected
Camano Water Association	2,592	15	-
Clinton Water District	1,980	17	-
Camano Island State Park	1,718	24	-
Maxwelton Water System	1,700	38	-
Fort Ebey State Park	1,443	21	-
Langley City Of	1,416	8	-
Harbor Hills Community Water System	1,373	782	-
Freeland Water and Sewer District	1,264	91	-
Cama Beach State Park	1,210	12	-
South Whidbey State Park	1,203	5	-
W&b Waterworks 1	1,112	1,660	-
Camano Co-Op Water & Power Co	1,071	19	-
Bayview Beach Water District	1,035	34	-
Scatchet Head Water District	900	27	-
Rolling Hills-Glencairn	872	46	-
Admirals Cove Water District	870	51	-
Camaloch Association	825	16	-
Hillcrest Village Water Co Inc	770	109	-
Northgate Terrace Community Club	750	39	-
Lost Lake Property Owners Assn	736	49	Clean
Vistaire Water System	647	978	-
Mecca Community Association	619	210	-
Camano Vista Water District	591	230	-
North Whidbey Water District	568	14	-
Sandy Hook Yacht Club Estates	540	20	-
Madrona Beach Comm Water System	539	41	-
Sunvista Sunlight Beach HOA	500	61	-
Sea View Water LLC	496	32	-
Lagoon Point Water District	495	92	-
Saratoga Water District	477	23	-
Penn Cove Water and Sewer District	460	37	-
Dugualla Community Inc	459	6	-
Combined Water System	435	62	-
Saratoga Beach Owners Assn	425	10	-
Silver Lake Water	425	9	-
Crosswoods Water Company	420	9	-
Whidbey West Water Assoc.	415	111	-
Sierra Country Club	400	15	-
Crockett Lake Water District	325	47	-
Rocky Point Community Club	320	20	-
Swantown Water District	318	41	-
Driftwood Heights Association	311	23	-
Beachcomber H2o Co	310	645	-
Camano Laguna Vista Water Assoc	310	54	-
Parkwood Manor MHP	301	39	-
Kens Korner	300	13	-
Mariners Cove Beach Club Inc	300	26	-

Compare beyond Washington

Mid-flagged peers for Island

Cross-state counties nearest Island on flagged-system share (97.7%) and cumulative violation count (25,141). 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.