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Counties → New York

Cattaraugus County, New York

SDWIS compliance plate

Sheet NY009 · Cattaraugus County 148 sys · 5,265 viol · #782/3254

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

  • VIOL-SEVERE 91.2% flagged
  • HEALTH-LOW 8.4% health
  • RANK-UPPER #782/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-MID 25.0% detect
  • SRC-GW GW lead 93%
  • SYS-LARGE 148 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Schoharie County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Cattaraugus County ranks #782 of 3,254 counties by people served, and #32 of 58 counties in New York. See methodology · corpus placement.

Cattaraugus County standing, lower-flagged corpus third

Flagged-system rate 91.2% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 8.4% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #782 of 3,254 · #32 of 58 in New York.

Flagged-rate neighbourhood around Cattaraugus County

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

0% 20% 40% 60% 80% 100% Niagara · lowest Schoharie · near Broome · near Cortland · highest 38.1% 90.3% 91% 91.2% 91.8% 92% 100%

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

Water Systems

System Name Population Violations PFAS
Olean City 14,500 8 Clean
Salamanca City 5,815 362 Detected
Asp - Red House Water Supply 4,030 8 Clean
Asp - Barton & Weller Trail 4,025 4 Clean
Gowanda Village 2,800 217 -
Allegany Village 2,000 81 -
Allegany Mountain Resort 1,950 4 -
Allegany Town District #8 (St. Bonas) 1,850 18 -
Franklinville Village 1,760 275 -
Randolph Town Water District 1,738 50 -
Ellicottville Town Water District 1,420 15 -
Little Valley Village 1,188 343 -
Cattaraugus Village 1,185 72 -
Delevan Village 1,090 47 -
Portville Village 1,040 105 -
Yorkshire Town Water District #1 900 5 -
Allegany-Limestone School 855 14 -
Ellicottville Central School 800 26 -
Machias Town Water District 700 61 -
Arrowhead Camping Area 700 23 -
South Dayton Village 661 25 -
Emerald Acres 600 0 -
Perrysburg Town Central Water District 584 144 -
Twin Lakes Mobile Homes 550 66 -
Catt-Alleg Boces Center at Ellicottville 500 5 -
Asp - Quaker Lake Bathhouse 500 1 -
Allegany Town Consolidated District #1 480 20 -
Carrollton Limestone Town Water District 459 38 -
Ashford West Valley Town Water District 410 4 -
Valley View Estates 404 19 -
Catt-Alleg Boces Center at Olean 400 137 -
Hinsdale Town Water District 350 64 -
Olean Town Water District 350 16 -
Sandusky Water Supply 336 12 -
Great Valley Town W.D. #2 (Sno-Pine) 320 16 -
Colonial Village 300 17 -
Onoville Marina Park 300 4 -
Camp Scouthaven 300 6 -
Camp Timbercrest 300 10 -
West Valley Demonstration Project 300 13 -
Camp Li-Lo-Li 275 15 -
Allegany Town Comprehensive WD (2008) 274 22 -
Triple R Campground 270 3 -
Circle C Ranch 250 11 -
Green Valley Estates 250 6 -
Lazy Acres Campground 240 1 -
Great Valley Town W.D. #1 230 8 -
Conewango Town Water District 217 4 -
Bear Creek Lake Resort 200 21 -
Portville Drive-IN 200 18 -

Compare beyond New York

Lower-flagged peers for Cattaraugus County

Cross-state counties nearest Cattaraugus County on flagged-system share (91.2%) and cumulative violation count (5,265). 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.