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Community Water System · PWS IL0990200

Grand Ridge

Grand Ridge, Illinois 61325 - drinking water served from groundwater sources to 515 people, tracked in EPA SDWIS and UCMR5.

515
People served
355
EPA violations
176
Health-based
Untested
UCMR5 result

The verdict

EPA records 355 drinking-water violations at Grand Ridge, 50% of them health-based - above the Illinois per-system average.

355
Total EPA violations on record
50%
Health-based (MCL / treatment failure)
515
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Grand Ridge

Grand Ridge is a local-owned community water system that delivers drinking water to 515 residents in Grand Ridge, Illinois (LaSalle County) through 249 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 355 total violations for this system , of which 176 (50%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 153 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Arsenic, recorded in 170 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Illinois, EPA tracks 5,117 public water systems serving 12,576,876 people, with 355,322 cumulative violations and 52,932 health-based violations on record. About 81% of systems in the state carry at least one violation, and state-wide the average per system is 69.4 violations. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Grand Ridge's 355 violations sit above the Illinois average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
515
Total Violations
355
Health-Based Violations
176
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
249
County
LaSalle
School/Daycare
No
MCL Violations
176
Monitoring Violations
153
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 170 2019
Public Notice Other 10 2017
Arsenic MR 8 2017
Total Haloacetic Acids (HAA5) MR 8 2023
TTHM MR 8 2023
TTHM MCL 6 2017
BHC-GAMMA MR 4 2012
Endothall MR 4 2012
OXAMYL MR 4 2012
Simazine MR 4 2012
Di(2-ethylhexyl) phthalate MR 4 2012
Picloram MR 4 2012
Dinoseb MR 4 2012
Aldicarb sulfoxide MR 4 2012
Carbofuran MR 4 2012
Atrazine MR 4 2012
HEXACHLOROBENZENE MR 4 2012
Pentachlorophenol MR 4 2012
Total Polychlorinated Biphenyls (PCB) MR 4 2012
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2012
ETHYLENE DIBROMIDE MR 4 2012
Chlordane MR 4 2012
LEAD AND COPPER RULE REVISIONS RPT 4 2025
Benzo(a)pyrene MR 4 2012
Dalapon MR 4 2012
Heptachlor MR 4 2012
Aldicarb MR 4 2012
Endrin MR 4 2012
Toxaphene MR 4 2012
Di(2-ethylhexyl) adipate MR 4 2012

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Grand Ridge.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID IL0990200 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Illinois Drinking Water Authority

Illinois EPA, Bureau of Water is the primacy agency that licenses and inspects Grand Ridge under EPA-delegated authority.

Open IL regulator portal

Source: Illinois EPA, Bureau of Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / IL0990200 / 5200
2023 Total Haloacetic Acids (HAA5) MR 8 SDWIS / IL0990200 / 2456
2023 TTHM MR 8 SDWIS / IL0990200 / 2950
2019 Arsenic MCL 170 SDWIS / IL0990200 / 1005
2017 Public Notice Other 10 SDWIS / IL0990200 / 7500
2017 Arsenic MR 8 SDWIS / IL0990200 / 1005
2017 TTHM MCL 6 SDWIS / IL0990200 / 2950
2013 Consumer Confidence Rule Other 2 SDWIS / IL0990200 / 7000
2012 BHC-GAMMA MR 4 SDWIS / IL0990200 / 2010
2012 Endothall MR 4 SDWIS / IL0990200 / 2033
2012 OXAMYL MR 4 SDWIS / IL0990200 / 2036
2012 Simazine MR 4 SDWIS / IL0990200 / 2037
2012 Di(2-ethylhexyl) phthalate MR 4 SDWIS / IL0990200 / 2039
2012 Picloram MR 4 SDWIS / IL0990200 / 2040
2012 Dinoseb MR 4 SDWIS / IL0990200 / 2041

How Grand Ridge Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Grand Ridge Illinois avg Federal benchmark
Total violations 355 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 176 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 515 2,458 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,117 regulated public water systems in Illinois.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Grand Ridge water safe to drink? ▼
Grand Ridge (PWS ID: IL0990200) has 355 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 515 people using Groundwater sources.
How many people does Grand Ridge serve? ▼
Grand Ridge serves 515 people in Grand Ridge, Illinois. It is a Local-owned system using Groundwater water sources with 249 service connections.
What type of violations does Grand Ridge have? ▼
Grand Ridge has 355 total violations: 176 health-based violations (MCL exceedances or treatment failures), 153 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Grand Ridge water? ▼
No PFAS testing data is available for Grand Ridge under the EPA's UCMR5 monitoring program.
What water source does Grand Ridge use? ▼
Grand Ridge uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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 system's figures are rendered directly from 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.