Drinking water quality · 2026
· Verified
What's in Pasadena Water and Power, CA tap water
56 contaminants were measured in the Pasadena Water and Power, CA water system's 2026 annual report. Each is shown below against its federal limit.
- Reporting year
- 2026
- Contaminants measured
- 56
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Pasadena Water and Power, CA
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
Lithium
● Detected (no federal limit)near national p90 (76.59999999999991 mg/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Pasadena Water and Power, CA's drinking water comes from ground water, drawn from 11 sources.
Source
- WELL
- WOODBURY
- BANGHAM WELL
- TWOMBLY WELL
- + 7 more
Treatment
- EASTSIDE CENTRL CHLORAMINE @ JONES RES.
- JONES RES. NO3 & CLO4 BLEND COMPLIANCE
- SUNSET-TANK #2-NO3,CLO4,123TCP,VOC BLEND
- + 9 more
Distribution
Also buys water from METROPOLITAN WATER DIST. OF SO. CAL., KINNELOA IRRIGATION DIST., and 3 more.
Historical readings · EPA Six-Year Review (2012–2019)
4 contaminants historically over EPA limits in Pasadena Water and Power, CA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
TCE worst: 2012 | 0.031 mg/L 6.2× | 0.005 mg/L | '12'13'14'15'16'17'18'19 |
PCE worst: 2012 | 0.0138 mg/L 2.8× | 0.005 mg/L | '12'13'14'15'16'17'18'19 |
TTHM worst: 2012 | 0.118 mg/L 1.5× | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE worst: 2018 | 13.2 mg/L 1.3× | 10 mg/L | '12'13'14'15'16'17'18'19 |
CARBON TETRACHLORIDE worst: 2012 | 0.00401 mg/L 80% near national p90 | 0.005 mg/L | '12'13'14'15'16'17'18'19 |
DEHP worst: 2012 | 0.0037 mg/L within | 0.006 mg/L | '12 |
HAA5 worst: 2013 | 0.034 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
FLUORIDE worst: 2017 | 1.45 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
ARSENIC worst: 2014 | 0.003 mg/L within below national p90 | 0.01 mg/L | '14'17 |
CIS DICHLOROETHYLENE 12 worst: 2012 | 0.0207 mg/L within above national p90 | 0.07 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2016 | 1.6 mg/L within | 10 mg/L | '16 |
DICHLOROETHYLENE 11 worst: 2015 | 0.00091 mg/L within below national p90 | 0.007 mg/L | '15 |
DICHLOROMETHANE worst: 2019 | 0.00054 mg/L within | 0.005 mg/L | '19 |
BARIUM worst: 2014 | 0.17 mg/L within near national p90 | 2 mg/L | '12'13'14'16'17'18'19 |
TRANS DICHLOROETHYLENE 12 worst: 2013 | 0.0042 mg/L within | 0.1 mg/L | '12'13'14 |
URANIUM worst: 2016 | 0.0268 ug/L within above national p90 | 30 ug/L | '12'13'14'15'16'17'18 |
TOLUENE worst: 2015 | 0.0006 mg/L within | 1 mg/L | '15 |
DBAA worst: 2012 | 0.0064 mg/L | — | '12'13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.016 mg/L | — | '12'13'14'15'16'17'18'19 |
MBAA worst: 2012 | 0.0013 mg/L | — | '12'13'16 |
MCAA worst: 2013 | 0.0032 mg/L | — | '13 |
TCAA worst: 2012 | 0.0096 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0379 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0119 mg/L | — | '12'13'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0445 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0307 mg/L | — | '12'13'14'15'16'17'18'19 |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | 0.004006666666666667 UG/LAverageSource water | 0.005 UG/LMCL | Approaching the limit |
| Benzene | Not detected UG/LHighest single sampleEntry point | 1 UG/LMCL | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleEntry point | 300 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleSource water | 1750 UG/LMCL | None detected |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 3.0508333333333333 UG/LAverageSource water | 6 UG/LMCL | Within the limit |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 91.11111111111111 UG/LAverageSource water | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorobenzene | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Dichloropropane 12 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 600 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleEntry point | 100 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleSource water | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
People also ask about Pasadena Water and Power, CA's water
+Is Pasadena Water and Power, CA tap water safe to drink in 2026?
Every one of the 56 contaminants measured in Pasadena Water and Power, CA's 2026 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Pasadena Water and Power, CA tap water?
56 contaminants were measured in Pasadena Water and Power, CA's 2026 Consumer Confidence Report, spanning other, pfas ("forever chemicals"), and disinfection byproducts. 26 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Pasadena Water and Power, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: 1,2,3-TCP. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Pasadena Water and Power, CA's 2026 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Pasadena Water and Power, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2026 report; a new report will replace it once the utility publishes its next annual update.