Overview
Legal does not necessarily equal safe.
- Getting a passing grade from the federal government does not mean the water meets the latest health guidelines.
- Legal limits for contaminants in tap water have not been updated in almost 20 years.
- The best way to ensure clean tap water is to keep pollution out of source water in the first place.
AquaPura's analysis shows 14 contaminant(s) detected in Oakland Water Department's water exceed recommended health guidelines, though they may be within legal limits set by the EPA.
Contaminants Detected
This Utility: 0.228 ppb
Legal Limit: 10 ppb
57x
EWG's Health Guideline:
0.004 ppb
0.004 ppb
Bromodichloromethane
Potential Effect: cancer
This Utility: 1.13 ppb
No Legal Limit
19x
EWG's Health Guideline:
0.06 ppb
0.06 ppb
Chromium (hexavalent)*
Potential Effect: cancer
This Utility: 0.504 ppb
No Legal Limit
25x
EWG's Health Guideline:
0.02 ppb
0.02 ppb
Dibromochloromethane
Potential Effect: cancer
This Utility: 2.08 ppb
No Legal Limit
21x
EWG's Health Guideline:
0.1 ppb
0.1 ppb
Haloacetic acids (HAA5)
Potential Effect: cancer
This Utility: 1.7 ppb
Legal Limit: 60 ppb
17x
EWG's Health Guideline:
0.1 ppb
0.1 ppb
Haloacetic acids (HAA9)*
Potential Effect: cancer
This Utility: 3.01 ppb
No Legal Limit
50x
EWG's Health Guideline:
0.06 ppb
0.06 ppb
This Utility: 4.08 ppm
Legal Limit: 10 ppb
29x
EWG's Health Guideline:
0.14 ppb
0.14 ppb
This Utility: 4.11 ppt
Legal Limit: 10 ppb
4,111x
EWG's Health Guideline:
0.001 ppb
0.001 ppb
This Utility: 0.56 ppt
Legal Limit: 10 ppb
93x
EWG's Health Guideline:
0.006 ppb
0.006 ppb
This Utility: 12 ppt
Legal Limit: 4 ppb
40x
EWG's Health Guideline:
0.3 ppb
0.3 ppb
Perfluorooctanoic acid (PFOA)
Potential Effect: cancer
This Utility: 13.8 ppt
Legal Limit: 4 ppb
153x
EWG's Health Guideline:
0.09 ppb
0.09 ppb
Total trihalomethanes (TTHMs)
Potential Effect: cancer
This Utility: 5.62 ppb
Legal Limit: 80 ppb
37x
EWG's Health Guideline:
0.15 ppb
0.15 ppb
This Utility: 0.79 ppb
No Legal Limit
Chloroform
Potential Effect: cancer
This Utility: 0.561 ppb
No Legal Limit
EWG's Health Guideline:
0.4 ppb
0.4 ppb
This Utility: 1.52 ppb
Legal Limit: 100 ppb
This Utility: 0.03 ppb
No Legal Limit
This Utility: 3.98 ppt
No Legal Limit
EWG's Health Guideline:
2000 ppt
2000 ppt
This Utility: 1.74 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
This Utility: 2.98 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
This Utility: 5.24 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
This Utility: 3.54 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
This Utility: 0.01 ppb
No Legal Limit
Trichloroacetic acid
Potential Effect: cancer
This Utility: 0.143 ppb
No Legal Limit
EWG's Health Guideline:
0.1 ppb
0.1 ppb
Find a Filter
See which water filtration technologies are effective at reducing the contaminants detected in this utility's water supply.
Carbon Filters
Filters 11 contaminants exceeding guidelines (+15 others)
Can reduce the levels of many common contaminants.
Pros
- Lower upfront cost
- Reduced maintenance
Cons
- Does not remove all contaminants
Reverse Osmosis
Filters 14 contaminants exceeding guidelines (+19 others)
Can reduce the levels of many common contaminants.
Pros
- Most effective
Cons
- Higher upfront cost
- Requires more maintenance
- Wastes water
Other Considerations
Ion Exchange
PROS: Softens hard water, Reduces some contaminants
CONS: Doesn't remove all contaminants
Whole-House Filters
PROS: Useful for reducing radiologicals and TCE
CONS: Expensive to install and maintain, Risk of bacterial contamination
Explore filter options for each contaminant. See which technologies are effective at reducing specific contaminants.
| Contaminant | Activated Carbon | Reverse Osmosis | Ion Exchange |
|---|---|---|---|
| Contaminants Above Health Guidelines | |||
| Arsenic | ✕ | ✓ | ✓ |
| Bromodichloromethane | ✓ | ✓ | ✕ |
| Bromoform | ✓ | ✓ | ✕ |
| Chromium (hexavalent)* | ✕ | ✓ | ✓ |
| Dibromoacetic acid | ✓ | ✓ | ✕ |
| Dibromochloromethane | ✓ | ✓ | ✕ |
| Haloacetic acids (HAA5) | ✓ | ✓ | ✕ |
| Haloacetic acids (HAA9)* | ✓ | ✓ | ✕ |
| Nitrate | ✕ | ✓ | ✓ |
| Perfluorohexane sulfonate (PFHXS) | ✓ | ✓ | ✕ |
| Perfluorononanoic acid (PFNA) | ✓ | ✓ | ✕ |
| Perfluorooctane sulfonate (PFOS) | ✓ | ✓ | ✕ |
| Perfluorooctanoic acid (PFOA) | ✓ | ✓ | ✕ |
| Total trihalomethanes (TTHMs) | ✓ | ✓ | ✕ |
| Other Contaminants Detected | |||
| 1,1-Dichloroethane | ✓ | ✓ | ✕ |
| 1,4-Dioxane | ✕ | ✓ | ✕ |
| Barium | ✕ | ✓ | ✓ |
| Butyl benzyl phthalate | ✓ | ✓ | ✕ |
| Chloroform | ✓ | ✓ | ✕ |
| Chromium (total) | ✕ | ✓ | ✓ |
| Di(2-ethylhexyl) phthalate | ✓ | ✓ | ✕ |
| Di-n-butyl phthalate | ✓ | ✓ | ✕ |
| Dichloroacetic acid | ✓ | ✓ | ✕ |
| Manganese | ✕ | ✕ | ✓ |
| Monobromoacetic acid* | ✓ | ✓ | ✕ |
| Monochloroacetic acid | ✓ | ✓ | ✕ |
| Perfluorobutane sulfonate (PFBS) | ✓ | ✓ | ✕ |
| Perfluorobutanoic Acid (PFBA) | ✓ | ✓ | ✕ |
| Perfluoroheptanoic acid (PFHPA) | ✓ | ✓ | ✕ |
| Perfluorohexanoic Acid (PFHxA) | ✓ | ✓ | ✕ |
| Perfluoropentanoic Acid (PFPeA) | ✓ | ✓ | ✕ |
| Phenanthrene | ✓ | ✓ | ✕ |
| Strontium* | ✕ | ✓ | ✓ |
| Trichloroacetic acid | ✓ | ✓ | ✕ |
| Vanadium* | ✕ | ✕ | ✓ |
Protect your family's health.
Don't wait for your utility to improve. Get a free water analysis from AquaPura and find the right filtration system for your home.