MADERA CO MD1-HIDDEN LAKE ESTATES
PWSID: CA2000544 · Madera, CA · Serves 162 people
MADERA CO MD1-HIDDEN LAKE ESTATES has 98 health-based violations out of 98 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
MADERA CO MD1-HIDDEN LAKE ESTATES (PWSID CA2000544) is a cws water system drawing from a surface water source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 162 people in Madera, CA, and is subject to primacy enforcement by the California drinking-water program.
The system's federal compliance record contains 98 total violations, with 98 classified as health-based (MCL exceedances or treatment-technique failures). 5 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Haloacetic Acids (HAA5), Arsenic. Recorded violations span 2010–2025.
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 California state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CA2000544
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Madera, CA
- Population Served
- 162
- Health Violations
- Yes (98)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Total Trihalomethanes (TTHM) | 47 | 47 |
| Haloacetic Acids (HAA5) | 44 | 44 |
| Arsenic | 3 | 3 |
| Chloroform | 3 | 3 |
| Total Coliform (RTCR) | 1 | 1 |
Violation History (98)
Frequently Asked Questions
Is MADERA CO MD1-HIDDEN LAKE ESTATES water safe to drink?
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What contaminants have been found in MADERA CO MD1-HIDDEN LAKE ESTATES water?
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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.