PlainWater
Counties → New York

Ontario County, New York

Water Systems
53
Population Served
92,863
Total Violations
3,446
299 health-based
PFAS Detected
2
of 10 tested

Violation Analysis

98.1%
Systems with Violations
65.0
Avg Violations per System
8.7%
Health-Based Violations

Water Source Types

SW
29 systems (55%)
GW
21 systems (40%)

PFAS Contamination

10
Systems Tested
2
PFAS Detected
20.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Ontario New York water systems by violation status, EPA SDWIS records.

No violations on record (1) One or more violations (49)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Geneva City 13,334 75 Clean
Canandaigua-Farmington Consolidated W.D. 13,000 29 Clean
Canandaigua City 11,264 98 Clean
McWa - Geneva 8,532 8 -
Canandaigua Town Cons. WD 6,607 27 Clean
Hopewell Cons WD 1 3,781 7 Clean
Gorham Town WD 3,420 172 Clean
Geneva WD #2 CSA 2,680 4 Clean
Seneca Town WD 2,625 10 -
Victor Village 2,443 43 -
Rushville Village 2,341 35 -
Clifton Springs Village 2,190 3 -
Phelps Town Consolidated WD 2,175 26 Clean
Phelps Village 2,118 17 -
Bloomfield Village Consolidated 1,814 55 -
Manchester Village 1,709 36 -
Hopewell Consolidated WD #2 1,615 22 -
Shortsville Village 1,320 57 -
J Warren Cutler Scout Reservation 1,300 33 -
Naples Consolidated 1,250 204 -
Canadice Wd1 1,067 0 -
Manchester Central WD 1,000 37 -
Bristol Harbour Water Corp 835 129 Detected
Port Gibson WD 475 26 -
Hunt Hollow Dev. Corp 400 130 -
Geneva WD #8 400 5 -
Phelps Route 14 WD 400 5 -
Bristol Mountain Water Works 318 322 -
East Bloomfield WD #2 302 58 -
Bristol Woodlands Campground 250 71 -
Bristol WD #1 203 57 Clean
The Ritz 156 56 -
The Sawmill 150 114 -
Country Side Park 125 159 -
Country Colony Estates 125 25 -
Cheerful Valley Campground 108 57 -
Winged Pheasant Golf Club 100 270 -
Arbor Hill Associates 100 53 -
Bristol Valley Homes 90 79 -
Ontario County Park 90 65 -
Elderlee, Inc. - Steel Plant 87 6 -
Parkview Fairways Golf Course 80 58 -
Flcc Muller Station 80 54 -
Riverside Park 56 119 -
Grape Country Estates 51 81 -
Honeoye Fish & Game Club 50 147 -
4-H Camp Bristol Hills 50 88 -
Monicas Pies 50 46 -
Geneva WD #13 40 2 -
Hidden Hollow 32 60 -

Other Counties in New York

Richmond County
1 systems · 8,271,000 served · 47 violations
Suffolk County
152 systems · 1,387,905 served · 3,402 violations
Nassau County
44 systems · 1,387,489 served · 7,471 violations
Westchester County
274 systems · 992,853 served · 15,832 violations
Erie County
108 systems · 955,615 served · 7,606 violations
Onondaga County
88 systems · 615,889 served · 2,561 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Ontario County? ▼
Ontario County has 3,446 total drinking water violations across 53 water systems, of which 299 are health-based violations. 98.1% of systems have at least one violation.
How many people get water from Ontario County systems? ▼
Water systems in Ontario County serve approximately 92,863 people through 53 public water systems.
Has PFAS been detected in Ontario County water? ▼
Of 10 water systems tested for PFAS in Ontario County, 2 had PFAS detected (20.0% detection rate).
What types of water sources supply Ontario County? ▼
Water systems in Ontario County use SW (29 systems), GW (21 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. 8.7% of Ontario County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - 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 Editorial

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.