Jan 27,
2026
Updated Water Quality Results for October 2025
Pasadena Water & Power remains committed to ensuring safe drinking water quality for all customers, including in the aftermath of the Eaton Fire. Ongoing water quality monitoring throughout the system continues to be performed with additional post-fire guidance provided by the State Water Resources Control Board Division of Drinking Water. Results continue to confirm safe drinking water quality for PWP’s entire service area.
Below are recent water quality testing results from the Eaton Fire impacted areas. To view previous water quality results, click here. To view water quality results throughout PWP’s service area, view our annual Consumer Confidence Report on Water Quality.
View Water Quality Results by Zone
| Pasadena Water and Power Calaveras Zone Water Quality Results (10/13/2025) | |||||
|---|---|---|---|---|---|
| Parameter | MCL | DLR / MRL | Typical | Range | MCL Violation |
| Volatile Organic Compounds (units in ppb) | |||||
| Benzene* | 1 | 0.5 | ND | ND | No |
| Vinyl Chloride* | 0.5 | 0.5 | ND | ND | No |
| 1,1-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| trans-1,2-Dichloroethylene* | 10 | 0.5 | ND | ND | No |
| Methyl tert-Butyl Ether* | 13 | 3 | ND | ND | No |
| 1,1-Dichloroethane* | 5 | 0.5 | ND | ND | No |
| cis-1,2-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| 1,1,1-Trichloroethane* | 200 | 0.5 | ND | ND | No |
| Carbon Tetrachloride* | 0.5 | 0.5 | ND | ND | No |
| 1,2-Dichloroethane* | 0.5 | 0.5 | ND | ND | No |
| Trichloroethylene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichloropropane* | 5 | 0.5 | ND | ND | No |
| Toluene* | 150 | 0.5 | ND | ND | No |
| 1,1,2-Trichloroethane* | 5 | 0.5 | ND | ND | No |
| Tetrachloroethylene* | 5 | 0.5 | ND | ND | No |
| Ehtyl Benzene* | 300 | 0.5 | ND | ND | No |
| m,p-Xylenes* | n/a | 0.5 | ND | ND | No |
| o-Xylene* | n/a | 0.5 | ND | ND | No |
| Total Xylenes* | 1750 | 0.5 | ND | ND | No |
| 1,4-Dichlorobenzene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichlorobenzene* | 600 | 0.5 | ND | ND | No |
| 1,2,4-Trichlorobenzene* | 5 | 0.5 | ND | ND | No |
| Freon 11 | 150 | 5 | ND | ND | No |
| Freon 113 | 1200 | 10 | ND | ND | No |
| Dichloromethane | 5 | 0.5 | ND | ND | No |
| cis-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| trans-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| Monochlorobenzene | 70 | 0.5 | ND | ND | No |
| Styrene | 100 | 0.5 | ND | ND | No |
| 1,1,2,2-Tetrachloroethane | 1 | 0.5 | ND | ND | No |
| Disinfection By-Products (DBP) (units in ppb) | |||||
| Total Trihalomethanes (TTHM) | 80 | n/a | 3 - 74 | 6 - 64 | No |
| Chloroform | n/a | 1 | 0.6 - 25.5 | 1.2 - 17.4 | n/a |
| Bromodichloromethane | n/a | 1 | 0.7 - 25.5 | 1.8 - 22.1 | n/a |
| Dibromochloromethane | n/a | 1 | 1.0 - 19.1 | 2.2 - 19.8 | n/a |
| Bromoform | n/a | 1 | 0.5 - 5.4 | 1.1 - 5.6 | n/a |
| General Physical | |||||
| Turbidity (NTU) | 5 | n/a | Normal Range ND - 0.1 | ND - 0.1 | No |
| pH (pH units) | n/a | n/a | Normal Range 7.1 - 7.7 | 7.5 - 8.4 | n/a |
| Total Chlorine Residual | MRDL = 4.0 | n/a | Normal Range ND - 3.0 | 1.1 - 1.5 | No |
| Microbiological | |||||
| Coliform Assessment (% positive) | TT | n/a | Highest Monthly Average = 0.6% | 0 | No |
| Fecal coliform / E. Coli | 0 | n/a | 0 | 0 | No |
* Fire-related analyte.
Treatment Technique (TT): A required process intended to reduce the level of a contaminant in the water.
| Pasadena Water and Power Murray Zone Water Quality Results (10/13/2025) | |||||
|---|---|---|---|---|---|
| Parameter | MCL | DLR / MRL | Typical | Range | MCL Violation |
| Volatile Organic Compounds (units in ppb) | |||||
| Benzene* | 1 | 0.5 | ND | ND | No |
| Vinyl Chloride* | 0.5 | 0.5 | ND | ND | No |
| 1,1-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| trans-1,2-Dichloroethylene* | 10 | 0.5 | ND | ND | No |
| Methyl tert-Butyl Ether* | 13 | 3 | ND | ND | No |
| 1,1-Dichloroethane* | 5 | 0.5 | ND | ND | No |
| cis-1,2-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| 1,1,1-Trichloroethane* | 200 | 0.5 | ND | ND | No |
| Carbon Tetrachloride* | 0.5 | 0.5 | ND | ND | No |
| 1,2-Dichloroethane* | 0.5 | 0.5 | ND | ND | No |
| Trichloroethylene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichloropropane* | 5 | 0.5 | ND | ND | No |
| Toluene* | 150 | 0.5 | ND | ND | No |
| 1,1,2-Trichloroethane* | 5 | 0.5 | ND | ND | No |
| Tetrachloroethylene* | 5 | 0.5 | ND | ND | No |
| Ehtyl Benzene* | 300 | 0.5 | ND | ND | No |
| m,p-Xylenes* | n/a | 0.5 | ND | ND | No |
| o-Xylene* | n/a | 0.5 | ND | ND | No |
| Total Xylenes* | 1750 | 0.5 | ND | ND | No |
| 1,4-Dichlorobenzene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichlorobenzene* | 600 | 0.5 | ND | ND | No |
| 1,2,4-Trichlorobenzene* | 5 | 0.5 | ND | ND | No |
| Freon 11 | 150 | 5 | ND | ND | No |
| Freon 113 | 1200 | 10 | ND | ND | No |
| Dichloromethane | 5 | 0.5 | ND | ND | No |
| cis-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| trans-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| Monochlorobenzene | 70 | 0.5 | ND | ND | No |
| Styrene | 100 | 0.5 | ND | ND | No |
| 1,1,2,2-Tetrachloroethane | 1 | 0.5 | ND | ND | No |
| Disinfection By-Products (DBP) (units in ppb) | |||||
| Total Trihalomethanes (TTHM) | 80 | n/a | 3 - 74 | 6 - 24 | No |
| Chloroform | n/a | 1 | 0.6 - 25.5 | 1.1 - 5.8 | n/a |
| Bromodichloromethane | n/a | 1 | 0.7 - 25.5 | 1.8 - 7.4 | n/a |
| Dibromochloromethane | n/a | 1 | 1.0 - 19.1 | 2.2 - 8.1 | n/a |
| Bromoform | n/a | 1 | 0.5 - 5.4 | 1.0 - 3.0 | n/a |
| General Physical | |||||
| Turbidity (NTU) | 5 | n/a | Normal Range ND - 0.1 | ND - 0.1 | No |
| pH (pH units) | n/a | n/a | Normal Range 7.1 - 7.7 | 7.7 | n/a |
| Total Chlorine Residual | MRDL = 4.0 | n/a | Normal Range ND - 3.0 | 1.0 - 1.6 | No |
| Microbiological | |||||
| Coliform Assessment (% positive) | TT | n/a | Highest Monthly Average = 0.6% | 0 | No |
| Fecal coliform / E. Coli | 0 | n/a | 0 | 0 | No |
* Fire-related analyte.
Treatment Technique (TT): A required process intended to reduce the level of a contaminant in the water.
| Pasadena Water and Power Don Benito Zone Water Quality Results (9/29/25) | |||||
|---|---|---|---|---|---|
| Parameter | MCL | DLR / MRL | Typical | Range | MCL Violation |
| Volatile Organic Compounds (units in ppb) | |||||
| Benzene* | 1 | 0.5 | ND | ND | No |
| Vinyl Chloride* | 0.5 | 0.5 | ND | ND | No |
| 1,1-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| trans-1,2-Dichloroethylene* | 10 | 0.5 | ND | ND | No |
| Methyl tert-Butyl Ether* | 13 | 3 | ND | ND | No |
| 1,1-Dichloroethane* | 5 | 0.5 | ND | ND | No |
| cis-1,2-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| 1,1,1-Trichloroethane* | 200 | 0.5 | ND | ND | No |
| Carbon Tetrachloride* | 0.5 | 0.5 | ND | ND | No |
| 1,2-Dichloroethane* | 0.5 | 0.5 | ND | ND | No |
| Trichloroethylene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichloropropane* | 5 | 0.5 | ND | ND | No |
| Toluene* | 150 | 0.5 | ND | ND | No |
| 1,1,2-Trichloroethane* | 5 | 0.5 | ND | ND | No |
| Tetrachloroethylene* | 5 | 0.5 | ND | ND | No |
| Ehtyl Benzene* | 300 | 0.5 | ND | ND | No |
| m,p-Xylenes* | n/a | 0.5 | ND | ND | No |
| o-Xylene* | n/a | 0.5 | ND | ND | No |
| Total Xylenes* | 1750 | 0.5 | ND | ND | No |
| 1,4-Dichlorobenzene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichlorobenzene* | 600 | 0.5 | ND | ND | No |
| 1,2,4-Trichlorobenzene* | 5 | 0.5 | ND | ND | No |
| Freon 11 | 150 | 5 | ND | ND | No |
| Freon 113 | 1200 | 10 | ND | ND | No |
| Dichloromethane | 5 | 0.5 | ND | ND | No |
| cis-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| trans-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| Monochlorobenzene | 70 | 0.5 | ND | ND | No |
| Styrene | 100 | 0.5 | ND | ND | No |
| 1,1,2,2-Tetrachloroethane | 1 | 0.5 | ND | ND | No |
| Disinfection By-Products (DBP) (units in ppb) | |||||
| Total Trihalomethanes (TTHM) | 80 | n/a | 3 - 74 | 6 - 14 | No |
| Chloroform | n/a | 1 | 0.6 - 25.5 | 1.0 - 2.7 | n/a |
| Bromodichloromethane | n/a | 1 | 0.7 - 25.5 | 1.7 - 4.0 | n/a |
| Dibromochloromethane | n/a | 1 | 1.0 - 19.1 | 2.3 - 4.6 | n/a |
| Bromoform | n/a | 1 | 0.5 - 5.4 | 1.0 - 2.4 | n/a |
| General Physical | |||||
| Turbidity (NTU) | 5 | n/a | Normal Range ND - 0.1 | ND | No |
| pH (pH units) | n/a | n/a | Normal Range 7.1 - 7.7 | 7.7 | n/a |
| Total Chlorine Residual | MRDL = 4.0 | n/a | Normal Range ND - 3.0 | 0.9 - 1.4 | No |
| Microbiological | |||||
| Coliform Assessment (% positive) | TT | n/a | Highest Monthly Average = 0.6% | 0 | No |
| Fecal coliform / E. Coli | 0 | n/a | 0 | 0 | No |
* Fire-related analyte.
Treatment Technique (TT): A required process intended to reduce the level of a contaminant in the water.
| Pasadena Water and Power Allen Zone Water Quality Results (10/8/2025) | |||||
|---|---|---|---|---|---|
| Parameter | MCL | DLR / MRL | Typical | Range | MCL Violation |
| Volatile Organic Compounds (units in ppb) | |||||
| Benzene* | 1 | 0.5 | ND | ND | No |
| Vinyl Chloride* | 0.5 | 0.5 | ND | ND | No |
| 1,1-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| trans-1,2-Dichloroethylene* | 10 | 0.5 | ND | ND | No |
| Methyl tert-Butyl Ether* | 13 | 3 | ND | ND | No |
| 1,1-Dichloroethane* | 5 | 0.5 | ND | ND | No |
| cis-1,2-Dichloroethylene* | 6 | 0.5 | ND | ND | No |
| 1,1,1-Trichloroethane* | 200 | 0.5 | ND | ND | No |
| Carbon Tetrachloride* | 0.5 | 0.5 | ND | ND | No |
| 1,2-Dichloroethane* | 0.5 | 0.5 | ND | ND | No |
| Trichloroethylene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichloropropane* | 5 | 0.5 | ND | ND | No |
| Toluene* | 150 | 0.5 | ND | ND | No |
| 1,1,2-Trichloroethane* | 5 | 0.5 | ND | ND | No |
| Tetrachloroethylene* | 5 | 0.5 | ND | ND | No |
| Ehtyl Benzene* | 300 | 0.5 | ND | ND | No |
| m,p-Xylenes* | n/a | 0.5 | ND | ND | No |
| o-Xylene* | n/a | 0.5 | ND | ND | No |
| Total Xylenes* | 1750 | 0.5 | ND | ND | No |
| 1,4-Dichlorobenzene* | 5 | 0.5 | ND | ND | No |
| 1,2-Dichlorobenzene* | 600 | 0.5 | ND | ND | No |
| 1,2,4-Trichlorobenzene* | 5 | 0.5 | ND | ND | No |
| Freon 11 | 150 | 5 | ND | ND | No |
| Freon 113 | 1200 | 10 | ND | ND | No |
| Dichloromethane | 5 | 0.5 | ND | ND | No |
| cis-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| trans-1,3-Dichloropropene | n/a | 0.5 | ND | ND | n/a |
| Monochlorobenzene | 70 | 0.5 | ND | ND | No |
| Styrene | 100 | 0.5 | ND | ND | No |
| 1,1,2,2-Tetrachloroethane | 1 | 0.5 | ND | ND | No |
| Disinfection By-Products (DBP) (units in ppb) | |||||
| Total Trihalomethanes (TTHM) | 80 | n/a | 3 - 74 | 52 - 79 | No |
| Chloroform | n/a | 1 | 0.6 - 25.5 | 12.2 - 28.3 | n/a |
| Bromodichloromethane | n/a | 1 | 0.7 - 25.5 | 16.8 - 26.8 | n/a |
| Dibromochloromethane | n/a | 1 | 1.0 - 19.1 | 17.4 - 25.9 | n/a |
| Bromoform | n/a | 1 | 0.5 - 5.4 | 3.9 - 6.9 | n/a |
| General Physical | |||||
| Turbidity (NTU) | 5 | n/a | Normal Range ND - 0.1 | ND - 0.1 | No |
| pH (pH units) | n/a | n/a | Normal Range 7.1 - 7.7 | 7.7 - 7.9 | n/a |
| Total Chlorine Residual | MRDL = 4.0 | n/a | Normal Range ND - 3.0 | 0.2 - 1.4 | No |
| Microbiological | |||||
| Coliform Assessment (% positive) | TT | n/a | Highest Monthly Average = 0.6% | 0 | No |
| Fecal coliform / E. Coli | 0 | n/a | 0 | 0 | No |
* Fire-related analyte.
Treatment Technique (TT): A required process intended to reduce the level of a contaminant in the water.
ABBREVIATIONS
- Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the Public Health Goals as is economically and technologically feasible. Secondary MCLs are set to protect the odor, taste, and appearance of drinking water.
- Detection Limits for Purposes of Reporting (DLR): The DLR is a parameter that is set by regulation for each reportable analyte. It is not laboratory specific and it is independent of the analytical method used (in cases where several methods are approved). It is expected that a laboratory can achieve a Reporting Limit that is lower than or equal to the DLR set by the DDW. This is also known as the Minimum Reporting Level (MRL).
- Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water. The addition of a disinfectant is necessary for the control of microbial contaminants.
- n/a: Not Applicable.
- ND: Contaminant was not detected. The contaminant is less than the DLR.
- ppb: parts per billion.
