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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
EPA records for VALLEY COUNTY WATER DIST. • Updated October 2026
Grade A — based on EPA compliance records, lead testing and PFAS monitoring
VALLEY COUNTY WATER DIST. has a clean recent record: no health-based violations in the last five years and no lead, PFAS or historical monitoring result that costs it more than a few points.
Yes — by EPA's records Baldwin Park, CA tap water is safe to drink and earns an A. The grade rests on nitrate averaging 3.8 mg/l against a 10 mg/l limit in 2012–2019 samples (20 over the limit). Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
Yes — by EPA's records Baldwin Park, CA tap water is safe to drink and earns an A. The grade rests on nitrate averaging 3.8 mg/l against a 10 mg/l limit in 2012–2019 samples (20 over the limit). Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
VALLEY COUNTY WATER DIST.'s most recent Lead and Copper Rule result (2021-01-01 to 2023-12-31) was 0 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 174 UCMR5 PFAS results for VALLEY COUNTY WATER DIST. (2024-10-31 to 2025-04-23) were at or above the reporting limit of roughly 3–5 ppt.
VALLEY COUNTY WATER DIST. has 1 violation on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
VALLEY COUNTY WATER DIST. reports groundwater as its primary source and serves about 68,871 people (EPA PWSID CA1910009).
Optional but sensible. The findings on this page are below federal limits; an NSF-certified pitcher or under-sink filter handles nitrate and improves taste.
Compare filter options for your Baldwin Park tap water
Historical monitoring (2012–2019) shows nitrate near or above the EPA limit in Baldwin Park.
See the filters matched to Baldwin Park's EPA results → — which certification actually removes what was found here, and what it does not touch.
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VALLEY COUNTY WATER DIST. · SDWIS records since 2016 · 5-year window starts 2021-09-13
EPA records no health-based violations for this system in the last five years.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Monitoring, Routine (RTCR)Revised Total Coliform Rule | Monitoring | 2019-08-01 → 2019-08-31 | Resolvedreturned 2019-08-31 |
Source: ECHO SDWA bulk download (SDWA_VIOLATIONS_ENFORCEMENT.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-13)
EPA Lead and Copper Rule 90th-percentile results reported by VALLEY COUNTY WATER DIST.
Well below the 15 ppb action level. In the most recent monitoring period on file (2021-01-01 to 2023-12-31), 90% of the homes VALLEY COUNTY WATER DIST. sampled had lead at or below 0 ppb.
EPA's action level is 15 ppb (dropping to 10 ppb under the 2024 Lead and Copper Rule Improvements). There is no safe level of lead; the 90th-percentile figure describes the system, not your tap — homes with lead service lines or pre-1986 plumbing can be higher.
| Monitoring period | Lead 90th percentile | vs 15 ppb action level |
|---|---|---|
| 2021-01-01 → 2023-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2018-01-01 → 2020-12-31 | 1.4 ppb | Well below the 15 ppb action level |
| 2015-01-01 → 2017-12-31 | 1.4 ppb | Well below the 15 ppb action level |
| 2012-01-01 → 2014-12-31 | 1.79 ppb | Well below the 15 ppb action level |
| 2009-01-01 → 2011-12-31 | 3 ppb | Well below the 15 ppb action level |
| 2006-01-01 → 2008-12-31 | 3 ppb | Well below the 15 ppb action level |
| 2005-01-01 → 2007-12-31 | 3 ppb | Well below the 15 ppb action level |
| 2005-01-01 → 2005-12-31 | 3.3 ppb | Well below the 15 ppb action level |
| 2005-01-01 → 2005-12-31 | 3 ppb | Well below the 15 ppb action level |
| 2003-01-01 → 2005-12-31 | 3 ppb | Well below the 15 ppb action level |
| 2002-01-01 → 2004-12-31 | 5 ppb | Below the action level, but detectable |
| 2003-01-01 → 2003-12-31 | 5 ppb | Below the action level, but detectable |
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-13)
EPA UCMR5 monitoring, 2024-10-31 to 2025-04-23 · 174 PFAS results at entry points to the distribution system
No PFAS detected. None of the 174 UCMR5 PFAS results for VALLEY COUNTY WATER DIST. were at or above the method reporting limit. Reporting limits are about 3–5 ppt, so “not detected” means below that threshold — not proven zero.
| Compound | Detects / samples | Max (ppt) | Reporting limit | EPA MCL |
|---|---|---|---|---|
| PFOA | 0 / 6 | < 4 | 4 ppt | 4 ppt |
| PFOS | 0 / 6 | < 4 | 4 ppt | 4 ppt |
| PFHxS | 0 / 6 | < 3 | 3 ppt | 10 ppt |
| PFNA | 0 / 6 | < 4 | 4 ppt | 10 ppt |
| HFPO-DA | 0 / 6 | < 5 | 5 ppt | 10 ppt |
| PFBS | 0 / 6 | < 3 | 3 ppt | hazard index only |
“< 4 ppt” means below the laboratory reporting limit, not zero. ppt = parts per trillion (ng/L). Results are for finished water leaving the treatment plant.
What PFAS are and how to remove them →
Source: UCMR5 occurrence data, EPA Data Summary July 2026 (UCMR5_All.txt)
EPA Six-Year Review 4 compliance samples for VALLEY COUNTY WATER DIST. · finished water only · dated data, released 2024
These are the regulated-contaminant samples VALLEY COUNTY WATER DIST. reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Nitrate (as N) is flagged below; the status column explains why. Treat this as history, not today's tap water.
| Contaminant | Samples | Average | Max | EPA limit | Status |
|---|---|---|---|---|---|
| Nitrate (as N) | 1,0411031 detects | 3.773 mg/L | 15 mg/L | 10 mg/LMCL | 20 of 1041 samples over MCL |
| Total trihalomethanes (TTHM) | 2,876213 detects | 0.169 µg/L | 27 µg/L | 80 µg/LMCL (LRAA) | Within MCL |
| Haloacetic acids (HAA5) | 2566 detects | 0.036 µg/L | 2.3 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
Averages count non-detects as zero. TTHM and HAA5 limits are locational running annual averages, so a single high sample is not a violation — we grade those on the average only. Lead and copper rows are individual tap samples and are shown for context; compliance (and our score) uses the 90th-percentile result above. LRAA = locational running annual average; ND = not detected.
Source: SYR4 Six-Year Review compliance monitoring data 2012–2019 (released 2024-03)
VALLEY COUNTY WATER DIST. · 12,727 service lines inventoried · Q2 2026 snapshot
VALLEY COUNTY WATER DIST. reports no lead or galvanized-requiring-replacement service lines and has classified 100% of its 12,727 lines as non-lead. Lead can still come from pre-1986 plumbing and fixtures inside a home.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID CA1910009 · See all California lead service lines. We may earn a commission from filters and test kits, at no extra cost to you.
Groundwater systems draw from wells; naturally occurring arsenic, nitrate, radium and uranium are the readings to watch, along with PFAS near industrial or military sites.
How to test your tap water and the treatment options that actually fit Baldwin Park homes
The most reliable way to know what is actually coming out of your tap is a certified mail-in lab test. City-wide EPA data (like the report above) reflects the water leaving the treatment plant, but contaminants such as lead and copper can be picked up from your own service line and household plumbing — so the water at your Baldwin Park faucet can differ from the system average. A state-certified lab measures dozens of contaminants at once with results you can trust; you can also find one near you through the EPA's certified-lab list at epa.gov/dwlabcert. Hardware-store test strips are cheaper and instant, but they only screen for a few basics (chlorine, hardness, pH, and a rough lead pass/fail) and are far less accurate — treat them as a first look, not a diagnosis.
Match the treatment to what your test finds. Reverse osmosis (RO) removes the widest range of contaminants — lead, arsenic, nitrate, PFAS, and dissolved solids — which makes an under-sink reverse osmosis system the most thorough choice for Baldwin Park households with heavy-metal or PFAS concerns. If your main issue is taste, odor, or chlorine, an activated carbon filter (pitcher, faucet, or under-sink) is simpler and cheaper and handles chlorine and many organic compounds well, though carbon alone does not remove arsenic, nitrate, or most PFAS. NSF-certified pitchers rated for lead reduction are the easiest way to start today while you decide on a permanent setup.
We may earn a commission from testing kits and filters purchased through these links, at no extra cost to you.
What Baldwin Park residents measured at their own tap (ZIPs 91706). All reader results →
Reader submissions are unverified and shown separately from EPA data. They reflect one tap on one day, not the utility's compliance record.
No reader results for Baldwin Park yet - yours would be the first. A hardness or TDS number from a $10 strip kit is enough to start the map.
Help build the first reader-sourced water map. Enter whatever your test strip, TDS pen or lab report shows - one number is enough.
Baldwin Park ranks #73 of 163 graded California cities.
Deep-dive guides for the specific contaminants EPA data flagged in Baldwin Park's water, with removal options for each.
Yes — by EPA's records Baldwin Park, CA tap water is safe to drink and earns an A. The grade rests on nitrate averaging 3.8 mg/l against a 10 mg/l limit in 2012–2019 samples (20 over the limit). Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
VALLEY COUNTY WATER DIST.'s most recent Lead and Copper Rule result (2021-01-01 to 2023-12-31) was 0 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 174 UCMR5 PFAS results for VALLEY COUNTY WATER DIST. (2024-10-31 to 2025-04-23) were at or above the reporting limit of roughly 3–5 ppt.
VALLEY COUNTY WATER DIST. has 1 violation on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
VALLEY COUNTY WATER DIST. reports groundwater as its primary source and serves about 68,871 people (EPA PWSID CA1910009).
Optional but sensible. The findings on this page are below federal limits; an NSF-certified pitcher or under-sink filter handles nitrate and improves taste.
Historical monitoring (2012–2019) shows nitrate near or above the EPA limit in Baldwin Park.
Best for Nitrate Removal
APEC Reverse Osmosis System
Reverse osmosis removes nitrate, which is unsafe for infants — the EPA-recommended treatment for nitrate (carbon pitchers don't remove it).
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Reverse osmosis systems for nitrate
Reverse osmosis is the EPA-recommended treatment for nitrate — browse Waterdrop RO systems built for it.
Shop Reverse Osmosis Systems →Whole-Home Filtration System
Whole-house system — treats every tap at the source
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Based on contaminants detected in your water, these resources may be helpful:
Find the right filter for your Baldwin Park water quality needs:
Tap water is one piece of the picture — our sister sites cover the rest for Baldwin Park, CA.
Predicted indoor radon by ZIP vs. the EPA 4 pCi/L action level.
Arsenic and nitrate risk for homes on a well instead of city water.
Understand your water better with our in-depth guides on contaminants, filtration, and water safety.