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Counties → New York

Herkimer County, New York

SDWIS compliance plate

Sheet NY043 · Herkimer County 125 sys · 13,517 viol · #969/3254

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

  • VIOL-SEVERE 96.0% flagged
  • HEALTH-LOW 3.4% health
  • RANK-UPPER #969/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 85%
  • SYS-LARGE 125 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Ulster County (+ 0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Herkimer County ranks #969 of 3,254 counties by people served, and #38 of 58 counties in New York. See methodology · corpus placement.

Herkimer County standing, mid-flagged corpus third

Flagged-system rate 96.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 3.4% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #969 of 3,254 · #38 of 58 in New York.

Flagged-rate neighbourhood around Herkimer County

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

0% 20% 40% 60% 80% 100% Niagara · lowest Herkimer · this county Hamilton · near Cortland · highest 38.1% 95.7% 96% 96.2% 96.6% 96.8% 100%

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

Water Systems

System Name Population Violations PFAS
Ilion (V) Water Works 8,053 88 Clean
Herkimer Village 7,606 604 Clean
Little Falls City 4,605 32 Clean
Frankfort (V) Water Works 2,995 200 -
Mohawk (V) Water Works 2,985 254 -
Nys Thruway - Indian Castle/Iroquois 2,780 286 -
Dolgeville (V) PWS 2,166 293 -
Old Forge Water District 1,766 74 -
East Herkimer Water District 1,024 14 Clean
Webb Water Dist.no.1- Old Forg Cpg Rst. 992 0 -
West Canada JR-SR High School 900 462 -
West Winfield Village 862 131 -
Newport Village 740 162 -
Frankfort WD #2 700 4 -
Middleville (V) Water Works 550 265 -
Frankfort WD #4 (Ilion) 535 6 -
Poland Village 508 85 Clean
Nys-Nicks Lake State Park 400 49 -
Ilion Perimeter Water District 354 3 -
Cedar Lake Club 300 43 -
Eagle Bay Park Association 300 92 -
Dolgeville Rod & Gun Club 250 10 -
Millers Grove Trailer Park 217 260 -
Adirondack American Legion #1118 200 30 -
Thendara Water District 193 11 -
Herkimer WD #3 (Highland-Steuben) 192 0 -
Frankfort WD #11 186 0 -
Adirondack Woodcraft Camps 179 40 -
Beardslee Castle 150 186 -
Trails End Campground & Mobile Park 150 251 -
Duffys at the Glenmore 150 104 -
Stonebridge Restaurant and Banquets 150 181 -
VFW Post 2338- George R. Pritchard 150 106 -
Salisbury Vfd 150 17 -
Htr Adirondacks 145 241 -
Country Club Grille 140 155 -
YMCA Camp Gorham 138 69 -
Wall Street Meadows 130 1,063 -
Nys-Hinckley Day Use Area 125 35 -
Holiday Shores Estates 125 450 -
Kenmore Cottages 125 31 -
Cooperstown KOA 120 48 -
Camp Mark VII 110 52 -
Manion Heights W.D. 105 12 -
Herkimer Diamond Mines, Inc. 101 56 -
Maplewood BBQ & Spirits 101 53 -
North Woods Lodge & Resort 100 259 -
Covewood Lodge 100 82 -
Viking Village 100 28 -
Eagle Bay Village 100 29 -

Compare beyond New York

Mid-flagged peers for Herkimer County

Cross-state counties nearest Herkimer County on flagged-system share (96.0%) and cumulative violation count (13,517). 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.