Public water system · AR0000003
ActiveCalico Rock Waterworks
At a glance
Calico Rock Waterworks (PWSID AR0000003) is an active community water system in Izard County, Arkansas. It reports serving 1,726 people through 714 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in November 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,726
Service connections
714
Primary source
GU
Groundwater under influence of surface water
System type
CWS
Community water system
System record
How does Calico Rock Waterworks compare with other water systems in Izard County?
By EPA's size categories, Calico Rock Waterworks is a small system (501 to 3,300 people). Izard County has 9 active public water systems, and Calico Rock Waterworks is the 3rd-largest of them by population served. Its population served is about 18% above the county average of 1,465 people per system, and accounts for 13% of the 13,182 people reported by systems filed under the county. Across Arkansas, the 853 active systems average 3,592 people each. Nationally, the average active community water system reports serving 6,703 people, so Calico Rock Waterworks is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Arkansas has 660 active community water systems, 77% of the state's 853 active systems. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 11 Arkansas systems (1.3%) list groundwater under influence of surface water as their primary source.
Who owns and regulates Calico Rock Waterworks?
EPA lists Calico Rock Waterworks as owned by a local government. The AR state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 7 of the 9 active systems in Izard County (78%) are also owned by a local government.
Does Calico Rock Waterworks have drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in November 2020. The violations listed here began between July 1999 and November 2020. By type: 7 required treatment not met, 3 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Surface Water Treatment Rule (4 of them). EPA lists 8 as resolved and 4 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2020-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-08-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2007-11-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2006-08-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2006-07-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2006-06-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 1999-09-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
| 1999-08-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
| 1999-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1999-07-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
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.
Calico Rock Waterworks: frequently asked questions
Who runs Calico Rock Waterworks?
Calico Rock Waterworks (PWSID AR0000003) is a community water system owned by a local government. It is regulated by the AR state drinking water program.
How many people does Calico Rock Waterworks serve?
Calico Rock Waterworks reports serving 1,726 people through 714 service connections in Izard County, Arkansas.
Where does Calico Rock Waterworks get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does Calico Rock Waterworks have any drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in November 2020. 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 Calico Rock Waterworks' 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, 8 are health-based, and the most recent began in November 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the AR state drinking water program.
Where can I find Calico Rock Waterworks' water quality report?
As a community water system, Calico Rock Waterworks must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Izard County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Melbourne Waterworks | Izard | 4,126 | Community | Groundwater |
| Horseshoe Bend Waterworks | Izard | 3,217 | Community | Groundwater |
| Oxford Waterworks | Izard | 1,402 | Community | Groundwater |
| Mt Pleasant Waterworks | Izard | 1,338 | Community | Groundwater under influence of surface water |
| Ar Dept of Correction Izard Co | Izard | 907 | Community | Groundwater |
| Guion Water Department | Izard | 249 | Community | Purchased surface water |
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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, “Calico Rock Waterworks, PWSID AR0000003, Arkansas”, https://aquacensus.com/water-systems/arkansas/calico-rock-waterworks-ar0000003 (data as of October 1, 2026).