Can you drink Norco tap water? What EPA records show
EPA CA3310025 · serves Norco, CA · about 25,068 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Norco, City of (EPA CA3310025)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Norco's main utility, Norco, City of: 1 health-based violation since July 1, 2021 in EPA records (EPA SDWIS). This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
What EPA records show for Norco, City of, as of October 14, 2026
Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Norco, City of use chloramine?
We didn't find chloramine in Norco, City of's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
Reported results in EPA records (data as of Oct 14–15, 2026)
EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
Lithium: found in 8 of 14 samples, average 10.8 µg/L, highest 35.9 µg/L (EPA UCMR 5 testing, Sep 2023–Jun 2024)
PFOS (a PFAS): found in 4 of 14 samples, average 4.8 ppt, highest 31.4 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
PFHxS (a PFAS): found in 6 of 14 samples, average 2.7 ppt, highest 13.8 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024)
PFPeA (a PFAS): found in 5 of 14 samples, average 2.5 ppt, highest 11.9 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024)
PFBA (a PFAS): found in 3 of 14 samples, average 2.4 ppt, highest 17.9 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024)
PFOA (a PFAS): found in 3 of 14 samples, average 2.1 ppt, highest 13.7 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024)
PFBS (a PFAS): found in 4 of 14 samples, average 1.8 ppt, highest 12.2 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024)
PFHxA (a PFAS): found in 5 of 14 samples, average 1.5 ppt, highest 7.3 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024)
Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Source: EPA SDWIS (ECHO SDWA bulk download), data as of Oct 14, 2026
Source: EPA UCMR 5 occurrence data, data as of Oct 15, 2026
These are EPA's public records for this water system, shown as of October 14, 2026. If you represent this utility, or think a record here is wrong, tell us: Report an error. If the error is in EPA's own records, your state drinking water program can correct it there, and this page updates at our next data refresh.
We don't give a safe or unsafe verdict. Here is what the public data shows: EPA records for Norco's main utility, Norco, City of, as of October 14, 2026. 1 health-based violation since July 1, 2021 in EPA records (EPA SDWIS). This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing. Under EPA's 2024 PFAS rule, water systems must meet the PFOA and PFOS limits (4.0 ppt each) by April 2029; in May 2026 EPA proposed allowing extensions to April 2031. Results before then are monitoring data, not violations. A guideline and a legal limit are different things, and this is public data, not a test of your tap.
Which utility supplies water in Norco?
Norco, City of is the main utility for Norco in EPA's records (EPA CA3310025), serving about 25,068 people (EPA SDWIS). Your water bill names your utility.
Does Norco tap water contain PFAS?
This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing. PFOS (a PFAS): found in 4 of 14 samples, average 4.8 ppt, highest 31.4 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024). PFOA (a PFAS): found in 3 of 14 samples, average 2.1 ppt, highest 13.7 ppt (EPA UCMR 5 testing, Sep 2023–Jun 2024). Under EPA's 2024 PFAS rule, water systems must meet the PFOA and PFOS limits (4.0 ppt each) by April 2029; in May 2026 EPA proposed allowing extensions to April 2031. Results before then are monitoring data, not violations. This is public data, not a test of your tap.
How recent is this data?
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026. Data may be one to three years old and may not reflect the water at your tap. If you want your own tap tested, use a state-certified laboratory.
We ship three things: the combo (Home Base $2,049, XL $2,149), carbon-only ($1,179), and the HW800 tankless RO ($569). Equipment only, shipped to your door; you or your plumber installs. Not available in Wisconsin yet. Pay by card or Affirm at checkout.
