D
40

Poor Water Quality

Middletown, CA 95461

Lake County · Population served: 2,557 · Data updated March 2026

Water Systems Serving This Area

🌊
Middletown Rancheria Community Water System
Groundwater · Pop. 487
PWSID: 090600141
🌊
ANDERSON SPRINGS CSD
Groundwater · Pop. 373
PWSID: CA1700502
🌊
MOUNTAIN OF ATTENTION WATER
Groundwater · Pop. 26
PWSID: CA1700527
🏔
LAZY S MOBILE RANCH
Surface water · Pop. 73
PWSID: CA1700609
🌊
CALLAYOMI COUNTY WATER DISTRICT
Groundwater · Pop. 1,598
PWSID: CA1710013

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
57.0
15 ppb 1 ppb Exceeded

Violation History (Last 5 Years)

25Total (5yr)
17Health-Based
3Major

Water Quality Summary

Understanding Your Water in Middletown

Tap water quality in Middletown, California (95461) receives an overall grade of D (Poor) with a score of 40 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 41 points below the California state average of 81. Compared to the national average (75), this area scores significantly lower. The area is served by 5 water systems providing water to approximately 2,557 people, using surface water and groundwater sources. Testing has found elevated levels of Lead that warrant attention. Over the past 5 years, water systems here have accumulated 25 violations, including 17 health-based violations.

Your Score 40/100 D
vs State 41 pts below California avg (81)
vs National 35 pts below national avg (75)

What a Grade D Means

A score of 40/100 signals poor water quality in Middletown, CA. Significant issues have been identified, which may include multiple violations, contaminant levels near or above regulatory limits, or PFAS contamination. We recommend reviewing the detailed contaminant data below, considering a certified water filter, and checking your utility's Consumer Confidence Report for the latest information.

Surface water: sourced from rivers, lakes, or reservoirs
Groundwater: drawn from underground aquifers via wells

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Tap water in Middletown, California receives a grade of D (Poor) with a score of 40/100. This indicates significant water quality concerns based on violation history, contaminant levels, or enforcement actions. We recommend reviewing the specific contaminants detected below and considering a certified water filter.

ZIP code 95461 is served by 5 water systems using surface water, groundwater sources, providing water to approximately 2,557 people. Multiple source types mean your water may come from a blend of surface and underground sources.

Yes — lead levels in Middletown, California are 57.0 ppb, which exceeds the EPA action level of 15 ppb. This is a serious concern. We strongly recommend using a certified lead-removal filter for all drinking and cooking water, and having your water independently tested.

No PFAS ("forever chemicals") were detected in water systems serving Middletown, California during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Middletown, California have received 25 violations in the last 5 years, including 17 health-based violations. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Middletown, California should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

Explore Nearby

Water Quality in Nearby ZIP Codes