How many water violations are in Waldo County?

Waldo County has 5,716 total drinking water violations across 77 water systems, of which 1,037 are health-based violations. 94.8% of systems have at least one violation.

How many people get water from Waldo County systems?

Water systems in Waldo County serve approximately 19,984 people through 77 public water systems.

Has PFAS been detected in Waldo County water?

Under EPA UCMR5, 1 of 1 tested systems in Waldo County had at least one PFAS detection (100.0% of the UCMR5-tested subset - not of all 77 SDWIS systems).

What types of water sources supply Waldo County?

Water systems in Waldo County use GW (77 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. 18.1% of Waldo County's violations are health-based. Among counties with any SDWIS violations, this extract puts Waldo County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

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

According to EPA SDWIS county population served used on /counties, Waldo County ranks #1,766 of 3,254 counties by people served, and #14 of 16 counties in Maine. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Maine

Waldo County, Maine

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet ME027 · Waldo County 77 sys · 5,716 viol · #1766/3254

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

VIOL-SEVERE 94.8% flagged
HEALTH-LOW 18.1% health
RANK-MID #1766/3254
PHOTO-FINISH ±0.3 pp
PFAS-HIGH 100.0% detect
SRC-GW GW lead 100%
SYS-MID 77 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Franklin County (+ 0.3 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Waldo County ranks #1,766 of 3,254 counties by people served, and #14 of 16 counties in Maine. See methodology · corpus placement.

Waldo County standing, mid-flagged corpus third

Flagged-system rate 94.8% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 18.1% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 100.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,766 of 3,254 · #14 of 16 in Maine.

Water Systems

System Name	Population	Violations	PFAS
Belfast Water District	5,698	32	Detected
Searsport Water District	2,763	109	-
Rsu 03 Mt View School	1,100	107	-
Winterport Water District	763	24	-
Lobster Pound Restaurant	618	60	-
Fort Knox	592	40	-
Northport Village Corp Water Dept	550	91	-
Bowens Pizzeria & Deli LLC	450	250	-
McLaughlins Lobster Shack	380	25	-
Tarratine Yacht Club	362	46	-
Penobscot Narrows Observatory	326	23	-
Msu 69 Lincolnville Central School	260	22	-
Belfast Curling Club	230	13	-
Ridge Top Restaurant	225	196	-
Northport Travel Park	205	31	-
Fair Haven Camps	192	76	-
Youngtown Inn	192	132	-
Loris Cafe	190	359	-
Mdoc State Park-Lake St George	184	51	-
Waldo County Technical Center	181	104	-
Savz Inc	180	115	-
The Lost Kitchen Mill	168	2	-
Rsu 12 Palermo Consolidated School	151	95	-
Rsu 71 Ames Elementary School	150	81	-
Clifford Arts & Student Center	150	42	-
Islesboro Community Center	147	98	-
Morrill Village Water District	143	49	-
Tarratine Golf Restaurant	134	35	-
Smk Donuts Inc-Dunkin Donuts Unity	133	0	-
Pride Manufacturing #1	129	342	-
The Ecology Learning Center	127	0	-
Tanglewood 4-H Camp	125	55	-
Mdoc State Park-Swan Lake	116	55	-
Islesboro Central School	115	109	-
Robbins Lumber	108	75	-
Rsu 71 Kermit S Nickerson School	107	36	-
Inn at Oceans Edge	105	27	-
Depot Country Store	102	30	-
The Sandy Point Water Company	98	45	-
Belfast Cohousing & Ecovillage Condos	90	14	-
Birchwood Trailer Park	90	44	-
Unity by the Stream LLC	88	233	-
Rsu 03 Troy Central School	85	70	-
Ducktrap Harbor Condominiums	83	37	-
Howards Trailer Park	75	340	-
Piper Stream Mobile Home Park	75	59	-
Hidden Valley Camp-Pd Barn	75	49	-
Camp Searsmont	72	101	-
Pottles Restaurant and Bar	72	107	-
Rsu 03 Monroe Elementary School	71	33	-

Compare beyond Maine

Mid-flagged peers for Waldo County

Cross-state counties nearest Waldo County on flagged-system share (94.8%) and cumulative violation count (5,716). 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.