SCUA Bylas
PWSID: 090400110 · San Carlos, AZ · Serves 3,160 people
SCUA Bylas has 32 health-based violations out of 32 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
SCUA Bylas (PWSID 090400110) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 3,160 people in San Carlos, AZ, and is subject to primacy enforcement by the Arizona drinking-water program.
The system's federal compliance record contains 32 total violations, with 32 classified as health-based (MCL exceedances or treatment-technique failures). 3 distinct contaminants have been cited, including E. coli, Fluoride, Arsenic. Recorded violations span 2016–2025.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Arizona state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- 090400110
- System Type
- CWS
- Water Source
- Groundwater
- Location
- San Carlos, AZ
- Population Served
- 3,160
- Health Violations
- Yes (32)
What contaminants are in this water system?
Violation History (32)
| Contaminant | Health | Date |
|---|---|---|
| Arsenic | Yes | May 28, 2025 |
| E. coli | Yes | Aug 1, 2024 |
| E. coli | Yes | Aug 1, 2024 |
| E. coli | Yes | Aug 1, 2024 |
| E. coli | Yes | May 1, 2023 |
| E. coli | Yes | May 1, 2023 |
| E. coli | Yes | May 1, 2023 |
| E. coli | Yes | May 1, 2023 |
| E. coli | Yes | May 1, 2023 |
| E. coli | Yes | May 1, 2023 |
| E. coli | Yes | May 1, 2023 |
| E. coli | Yes | May 1, 2023 |
| Fluoride | Yes | Mar 4, 2023 |
| Fluoride | Yes | Mar 4, 2023 |
| Fluoride | Yes | Mar 4, 2023 |
| Fluoride | Yes | Mar 4, 2023 |
| Fluoride | Yes | Mar 4, 2023 |
| Fluoride | Yes | Mar 4, 2023 |
| Fluoride | Yes | Mar 4, 2023 |
| E. coli | Yes | Feb 1, 2023 |
| Fluoride | Yes | Sep 1, 2022 |
| Fluoride | Yes | Sep 1, 2022 |
| Fluoride | Yes | Sep 1, 2022 |
| E. coli | Yes | Sep 30, 2018 |
| E. coli | Yes | Sep 30, 2018 |
| E. coli | Yes | Sep 30, 2018 |
| E. coli | Yes | Jul 1, 2017 |
| E. coli | Yes | Jul 1, 2017 |
| E. coli | Yes | Jul 1, 2017 |
| E. coli | Yes | Aug 1, 2016 |
| E. coli | Yes | Aug 1, 2016 |
| E. coli | Yes | Aug 1, 2016 |
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.