Water Quality Report

MWD OF SO CAL IRON MOUNTAIN

La Verne, CA27 people servedSW
This system appears to be in good standing.
Not included in federal PFAS testing (systems under 3,300 people). No violations on record.
N/TPFAS
ALead
AViolations
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A
Lead
No action needed
Low lead service line risk
no lead lines identified
ALL CLEAR
A
Violations
No action needed
No health violations on record
ALL CLEAR
N/T
PFAS
Not tested
This system was not included in federal PFAS monitoring
FYI
Measured in your 2023 water report
From your utility's Consumer Confidence Report · 3 contaminants tested
Contaminants detected above federal limits
Your utility's own 2023 water report disclosed the following levels. Utilities have until 2029 to comply with new federal limits.
ContaminantDetected LevelFederal LimitHow Far Over
Lead4 mg/L0.015 mg/L~267× the limit
Above limit
Approaching limit
Within limits
Limit
Lead
4 mg/L ×266.7
What is it?
Lead in drinking water almost always comes from your home's plumbing — not from the water source or treatment plant. Lead pipes, solder, and brass fixtures can leach lead, especially if water sits in pipes for hours.
Why it matters
There is no safe level of lead exposure. Even low levels can harm children's brain development, and cause kidney and blood pressure problems in adults. The action level of 15 µg/L is a regulatory trigger, not a safety threshold.
What to do
Run your tap for 30 seconds to 2 minutes before drinking, especially in the morning. Use cold water for cooking and formula — hot water leaches more lead. A filter certified to NSF/ANSI 53 for lead removal is the most reliable protection.
Copper
0.47 mg/L
What is it?
Leaches from copper household plumbing and pipes. Some copper is a normal part of drinking water infrastructure.
Why it matters
Short-term exposure above the action level of 1.3 mg/L can cause gastrointestinal distress. Long-term exposure can cause liver and kidney damage. At typical detected levels (well below the AL), copper is not a health concern.
What to do
If above the action level, run your tap for 30 seconds before drinking. Copper levels decrease as water flows through the pipes.
% of limit

CCR data in early access — values are extracted from utility PDFs and may contain errors. Verify with your utility's 2023 CCR report.

Source: MWD OF SO CAL IRON MOUNTAIN Consumer Confidence Report 2023 · Extracted by WaterScore · Confidence: raw
Model estimates
Private Well Risk

Do you have or use a private well? Estimated contamination risk for wells in this area based on local geology and land use.

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Surface water
Water Sources

La Verne draws from surface water — River. Drought directly affects reservoir levels and river flow.

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Spatial context
Your area on the map
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Data sources: EPA SDWIS · EPA UCMR5 · USGS. WaterScore is informational only and does not constitute health or legal advice. Last updated: 2026.

System ID: CA3600382 · Search another address · About & Methodology · Contact