Public water system · IL3113985
ActiveRiverdale School District #100
At a glance
Riverdale School District #100 (PWSID IL3113985) is an active non-transient non-community water system in Rock Island County, Illinois. It reports serving 1,340 people through 5 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,340
Service connections
5
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Riverdale School District #100 compare with other water systems in Rock Island County?
By EPA's size categories, Riverdale School District #100 is a small system (501 to 3,300 people). Rock Island County has 102 active public water systems. Its population served is about 16% below the county average of 1,592 people per system, and accounts for 0.8% of the 162,391 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Riverdale School District #100 is about 3.1 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Illinois has 396 active non-transient non-community water systems, 10% of the state's 3,872 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,808 Illinois systems (73%) list groundwater as their primary source.
Who owns and regulates Riverdale School District #100?
EPA lists Riverdale School District #100 as under public/private ownership. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 16 of the 102 active systems in Rock Island County (16%) are also under public/private ownership.
Does Riverdale School District #100 have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2026. The violations listed here began between December 2024 and February 2026. By type: 6 public notice, recordkeeping or other, 3 monitoring and reporting, 2 monitoring and 1 reporting. The contaminant or rule involved most often is Public Notice (6 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-02-26 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2026-02-21 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-12-31 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2025-10-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2025-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2025-06-07 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-06-06 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-04-05 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2024-12-21 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Riverdale School District #100: frequently asked questions
Who runs Riverdale School District #100?
Riverdale School District #100 (PWSID IL3113985) is a non-transient non-community water system under public/private ownership. It is regulated by the IL state drinking water program.
How many people does Riverdale School District #100 serve?
Riverdale School District #100 reports serving 1,340 people through 5 service connections in Rock Island County, Illinois.
Where does Riverdale School District #100 get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Riverdale School District #100 have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2026. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Riverdale School District #100's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2026. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Riverdale School District #100's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Riverdale School District #100 is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Rock Island County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Moline | Rock Island | 44,500 | Community | Surface water |
| Rock Island | Rock Island | 39,018 | Community | Surface water |
| East Moline | Rock Island | 21,374 | Community | Surface water |
| Rock Island Arsenal, Us Army | Rock Island | 7,800 | Community | Surface water |
| Silvis | Rock Island | 7,473 | Community | Purchased surface water |
| Niabi Zoo | Rock Island | 5,000 | Transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Riverdale School District #100, PWSID IL3113985, Illinois”, https://aquacensus.com/water-systems/illinois/riverdale-school-district-100-il3113985 (data as of October 1, 2026).