Water Quality Report · Updated May 12, 2026
CITY OF PITTSBURG
CITY OF PITTSBURG delivers tap water graded D (62/100) by TapWaterSafety.org. The utility serves approximately 62,500 residents in PITTSBURG, California using surface water (purchased). The most significant water quality concerns are: Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Bromodichloromethane significantly above health guideline. For questions, the utility can be reached at 925-252-4936.
Is PITTSBURG tap water safe to drink?
CITY OF PITTSBURG delivers tap water that earns a grade of D (62/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including total trihalomethanes (tthms) significantly above health guideline.
The utility serves 62,500 residents in PITTSBURG, drawing from surface water (purchased).
Public testing data identifies 16 contaminants in this water above EWG's health-based guidelines, including: Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Bromodichloromethane, Dibromochloromethane, Haloacetic acids (HAA9), Dibromoacetic acid, Bromoform, Bromate*, Trichloroacetic acid, Chloroform, Dichloroacetic acid, Uranium, Chromium (hexavalent), Nitrate, Nitrate and nitrite*, Bromochloromethane. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
Quick actions for PITTSBURG residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for CITY OF PITTSBURG.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 53.9 ppb, 360x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 35.4 ppb, 354x above the EWG health guideline of 0.1 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 13.8 ppb, 230x above the EWG health guideline of 0.06 ppb.
Contact CITY OF PITTSBURG
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for PITTSBURG
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 62/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Total trihalomethanes (TTHMs) Disinfection byproduct |
53.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 360× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
35.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 354× over |
| Bromodichloromethane Disinfection byproduct |
13.8 ppb | 0.06 | — | — | — | — | — | 230× over |
| Dibromochloromethane Disinfection byproduct |
20.0 ppb | 0.1 | — | — | — | — | — | 200× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
11.9 ppb | 0.06 | — | — | — | — | — | 199× over |
| Dibromoacetic acid Disinfection byproduct |
2.4 ppb | 0.03 | — | — | — | — | — | 80× over |
| Bromoform Disinfection byproduct |
13.7 ppb | 0.5 | — | — | — | — | — | 27× over |
| Bromate* Disinfection byproduct |
2.31 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 23× over |
| Trichloroacetic acid Disinfection byproduct |
2.02 ppb | 0.1 | — | — | — | — | — | 20× over |
| Chloroform Disinfection byproduct |
6.34 ppb | 0.4 | — | — | — | — | — | 16× over |
| Dichloroacetic acid Disinfection byproduct |
2.37 ppb | 0.2 | — | — | — | — | — | 12× over |
| Uranium Radiological |
3.74 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 8.7× over |
| Chromium (hexavalent) Heavy metal |
0.143 ppb | 0.02 | — | — | — | — | — | 7.1× over |
| Nitrate Inorganic |
0.783 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 5.6× over |
| Nitrate and nitrite* Inorganic |
0.272 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.9× over |
| Bromochloromethane Other |
0.0917 ppb | 0.06 | — | — | — | — | — | 1.5× over |
| Manganese Heavy metal |
32.0 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Vanadium Other |
3.87 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Chlorate* Disinfection byproduct |
34.4 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.74 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
15.2 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.0773 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.01 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.284 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Bromide* Other |
64.0 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.603 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
17.0 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
CITY OF PITTSBURG service area
This water system serves 1 community in Contra Costa County, California. Click any city for its dedicated tap water quality page.
Find the right filter for PITTSBURG water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.