Community Water System · PWSID IL1610650

Rock Island

Serves 39,018 peopleSurface WaterOwner: Local GovernmentRock Island, Illinois

Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2020: 36 violations. 35 missed or late tests · 1 notice or report. Most recent began 2025-07-01.

None of them is a measurement of contaminated water.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

0Over the limit

0Treatment lapse

35Missed or late test

1Notice or report1 open

More violations on record than 94% of active water systems in Illinois. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

One square ≈ 3 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.

97% missed or late test · 353% notice or report · 1

Across Illinois, 81% of violations are missed or late tests and 3% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 4 results on file · action level 15 ppb

6 ppb

5.7 ppb

1.8 ppb

1.4 ppb

Open now (1)

2025-07-01Consumer Confidence RuleCCR Inadequate ReportingOpen

Every violation on record

2025-07-01Consumer Confidence RuleCCR Inadequate ReportingOpen
2023-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
2023-04-01ToxapheneMonitoring, RegularBack in compliance
2020-04-01ChlordaneMonitoring, RegularBack in compliance
2020-04-01Ethylene DibromideMonitoring, RegularBack in compliance
2020-04-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularBack in compliance
2020-04-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
2020-04-01AldrinMonitoring, RegularBack in compliance
2020-04-01PentachlorophenolMonitoring, RegularBack in compliance
2020-04-01Benzo(a)pyreneMonitoring, RegularBack in compliance
2020-04-01HexachlorobenzeneMonitoring, RegularBack in compliance
2020-04-012, 4, 5-TpMonitoring, RegularBack in compliance
2020-04-012, 4-DMonitoring, RegularBack in compliance
2020-04-01DieldrinMonitoring, RegularBack in compliance
2020-04-01Heptachlor epoxideMonitoring, RegularBack in compliance
2020-04-01HeptachlorMonitoring, RegularBack in compliance
2020-04-01LassoMonitoring, RegularBack in compliance
2020-04-01AtrazineMonitoring, RegularBack in compliance
2020-04-01AldicarbMonitoring, RegularBack in compliance
2020-04-01CarbofuranMonitoring, RegularBack in compliance
2020-04-01Aldicarb sulfoneMonitoring, RegularBack in compliance
2020-04-01Aldicarb sulfoxideMonitoring, RegularBack in compliance
2020-04-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
2020-04-01DinosebMonitoring, RegularBack in compliance
2020-04-01PicloramMonitoring, RegularBack in compliance

Show the other 11 entries

2020-04-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
2020-04-01SimazineMonitoring, RegularBack in compliance
2020-04-01OxamylMonitoring, RegularBack in compliance
2020-04-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
2020-04-01EndothallMonitoring, RegularBack in compliance
2020-04-01DiquatMonitoring, RegularBack in compliance
2020-04-01DalaponMonitoring, RegularBack in compliance
2020-04-01ToxapheneMonitoring, RegularBack in compliance
2020-04-01MethoxychlorMonitoring, RegularBack in compliance
2020-04-01Bhc-GammaMonitoring, RegularBack in compliance
2020-04-01EndrinMonitoring, RegularBack in compliance

System details

Population served	39,018
Service connections	15,072
Water source	Surface Water
System type	Community Water System
Owner	Local Government
Status	Active
City	Rock Island
EPA ZIP on file	61201

Areas served

Rock Island, Rock Island County

Reading this record

Rock Island is a community water system that draws from surface water and serves about 39,018 people in Rock Island, Illinois. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.