ZIP 93422 is in the Atascadero, CA area, most likely served by ATASCADERO MUTUAL WATER CO. 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 93422. 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.
Four results are above their 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 →Reverse osmosis, or carbon certified for PFAS. Check for NSF/ANSI 58 or 53, with PFOA/PFOS/PFBS/PFHxS/PFBA named on the listing.
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 →
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The public system on record for ZIP 93422 (Atascadero, CA) is ATASCADERO MUTUAL WATER CO. A ZIP is a postal boundary, not a service area. Confirm your supplier on your water bill.
ZIP 93422 falls within the Atascadero, 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.