Perfluorooctanesulfonic acid
5.8ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: Two PFAS, PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); lithium sits above a screening level. Redlands City MUD-Water Div serves 78,025 residents.
EPA lists this system for the city. Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
Each bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.
5.8ng/L
Each block = 4.0 ng/L federal MCL (2024)
4.3ng/L
Each block = 4.0 ng/L federal MCL (2024)
REDLANDS CITY MUD-WATER DIV (EPA PWSID CA3610037) delivers surface water to 78,025 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
PFOS 5.8 ng/L, above the 4 ng/L limit (+2 more PFAS detected)
lead 2.9 µg/L, below the 15 µg/L action level
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
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
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 →
Each card names which Redlands findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Redlands, PFOS 5.8 ng/L and PFOA 4.3 ng/L were measured above the 4 ng/L federal limit in EPA's 2024 testing; the lead 90th-percentile result was 2.9 µg/L against the 15 µg/L action level. REDLANDS CITY MUD-WATER DIV (PWSID CA3610037) has a Purity Score of 66/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
REDLANDS CITY MUD-WATER DIV (PWS ID CA3610037) is the public water system on record for Redlands, California, serving about 78,025 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2023-08-01 to 2024-05-08), PFOS was measured at 5.8 ng/L against a 4 ng/L federal limit and PFOA was measured at 4.3 ng/L against a 4 ng/L federal limit. PFHxS was detected below its limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
REDLANDS CITY MUD-WATER DIV's most recent lead 90th-percentile result (2021–2023) was 2.9 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
PurityMap's current record for Redlands holds 31 findings: 3 above a reference, 2 detected within the reference and 26 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 20 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorooctanesulfonic acid (PFOS) | 5.8 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorooctanoic acid (PFOA) | 4.3 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorohexanesulfonic acid (PFHxS) | 4.8 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Lead (90th percentile) | 2.9 µg/L | 15 µg/L federal action level | Below the listed reference | 2021–2023 monitoring period | Lead & Copper Rule 90th-percentile: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-01 to 2024-05-08 | UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorohexanesulfonic acid (PFHxS)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanoic acid (PFHxA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: REDLANDS CITY MUD-WATER DIV (CA3610037)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: REDLANDS CITY MUD-WATER DIV (CA3610037)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Redlands City MUD-Water Div reported something related, it's shown below.
Lead at Redlands City MUD-Water Div: 2.9 µg/L (90th percentile, 2021–2023 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.