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Counties → Maine

Knox County, Maine

SDWIS compliance plate

Sheet ME013 · Knox County 47 sys · 3,529 viol · #1347/3254

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

  • VIOL-SEVERE 91.5% flagged
  • HEALTH-MID 25.7% health
  • RANK-MID #1347/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 91%
  • SYS-MID 47 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: York County (+ 0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Knox County ranks #1,347 of 3,254 counties by people served, and #10 of 16 counties in Maine. See methodology · corpus placement.

Knox County standing, lower-flagged corpus third

Flagged-system rate 91.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 25.7% is health-based share above the upper 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 #1,347 of 3,254 · #10 of 16 in Maine.

Flagged-rate neighbourhood around Knox County

Lowest/highest poles plus in-state counties nearest Knox County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Androscoggin · lowest York · near Penobscot · near Sagadahoc · highest 87.2% 91.5% 91.6% 92.4% 93.5% 94% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Maine Water Company Camden & Rockland 21,315 25 Clean
Mdoc State Park-Camden Hills 1,573 42 -
Vinalhaven Water District 1,053 212 Clean
Maine Water Company Warren Division 815 4 -
North Haven Water Department 740 734 -
Tenants Harbor Water District 378 90 -
Port Clyde Water District 330 79 -
Camp Med-O-Lark 300 115 -
Sennebec Lake Campground 1-Lodge 243 114 -
Mic Mac Cove Campground Inc 240 107 -
Maine Water Company Union Division 238 0 -
Alford Lake Camp #2 220 76 -
Hope Elementary School 207 8 -
Knox County Fish & Game Club 203 175 -
Camden Snow Bowl 200 24 -
Craignair Inn 192 49 -
Sandy Shores Owners Assn 188 15 -
Rsu 40 Union Elementary-Middle School 180 80 -
Camp Bishopswood 170 16 -
Msu 69 Appleton Village School 168 39 -
Rsu 40 Prescott Memorial School 130 32 -
Mountainside Mobile Home Park 130 113 -
Lobster Buoy Campsite 100 44 -
Oakland Park Bowling Center 100 312 -
Outward Bound -the Landing 100 12 -
Cushing Community School 99 29 -
The Pitch 95 18 -
Blueberry Cove Camp 89 188 -
Friendship Water Department 85 9 -
Hurricane Island Center for Science 77 40 -
Little Learners Childcare 77 2 -
Ashwood Waldorf School 72 64 -
Lie-Nielsen Toolworks 60 16 -
Elliott Apartments 55 135 -
Sennebec Lake Campground 2-Store 55 0 -
Crawford Commons 50 70 -
Center for Furniture Craftsmanship 47 18 -
Four Winds Homeowners Assn 43 5 -
Village at Rockport #4 43 6 -
Travelers Motel 35 84 -
High Tide Inn (Inn) 32 91 -
High Tide Inn (Deckhouse) 30 133 -
Village at Rockport #1 30 16 -
Village at Rockport #2 30 0 -
Dollar General-Union 25 0 -
US Nps Isle Au Haut Ranger Station 25 85 -
Village at Rockport #3 25 3 -

Compare beyond Maine

Lower-flagged peers for Knox County

Cross-state counties nearest Knox County on flagged-system share (91.5%) and cumulative violation count (3,529). 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

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.