ZIP 93408 is in the San Luis Obispo, CA area, most likely served by SAN LUIS OBISPO WATER DEPARTMENT. A ZIP is a postal boundary, not a service area, so confirm your supplier on your water bill.
Results describe the water system, not a specific tap in ZIP 93408. Each bar marks the listed reference for that substance.
Not measured: no utility report on file. Hardness affects fixtures and appliances, not health.
Below each lab’s reporting limit. A result, not zero, and it covers only what was tested.
Nothing here is above its listed reference. Lead mostly enters from building plumbing, which this system-level record can’t see.
The same system record, with every finding and its source.
Open city report →Lead-certified carbon filter, or reverse osmosis. Check for NSF/ANSI 53 (lead).
See treatment →The only way to see what your building adds.
How to test →Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
When your results arrive, read them here → · Compare every kit we list
Follow ZIP 93408's water
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Follow ZIP 93408's water →The public system on record for ZIP 93408 (San Luis Obispo, CA) is SAN LUIS OBISPO WATER DEPARTMENT. A ZIP is a postal boundary, not a service area. Confirm your supplier on your water bill.
ZIP 93408 falls within the San Luis Obispo, CA area, but a ZIP code can span more than one utility. Read the serving system's own record for the results that apply to your address.
Check the utility name on your water bill, or resolve it from your street address with Find My Water. The ZIP-level view lists candidate systems, not a confirmed household match.