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 21 contaminant(s) detected in Norwalk Water Department's water exceed recommended health guidelines, though they may be within legal limits set by the EPA.
Contaminants Detected
This Utility: 2 ppb
Legal Limit: 10 ppb
500x
EWG's Health Guideline:
0.004 ppb
0.004 ppb
Bromodichloromethane
Potential Effect: cancer
This Utility: 7.82 ppb
No Legal Limit
130x
EWG's Health Guideline:
0.06 ppb
0.06 ppb
Chloroform
Potential Effect: cancer
This Utility: 7.59 ppb
No Legal Limit
19x
EWG's Health Guideline:
0.4 ppb
0.4 ppb
Chromium (hexavalent)*
Potential Effect: cancer
This Utility: 0.453 ppb
No Legal Limit
23x
EWG's Health Guideline:
0.02 ppb
0.02 ppb
Dibromochloromethane
Potential Effect: cancer
This Utility: 8.78 ppb
No Legal Limit
88x
EWG's Health Guideline:
0.1 ppb
0.1 ppb
Haloacetic acids (HAA5)
Potential Effect: cancer
This Utility: 36.2 ppb
Legal Limit: 60 ppb
362x
EWG's Health Guideline:
0.1 ppb
0.1 ppb
Haloacetic acids (HAA9)*
Potential Effect: cancer
This Utility: 7.04 ppb
No Legal Limit
117x
EWG's Health Guideline:
0.06 ppb
0.06 ppb
This Utility: 1.82 ppm
Legal Limit: 10 ppb
13x
EWG's Health Guideline:
0.14 ppb
0.14 ppb
This Utility: 4.76 ppt
Legal Limit: 10 ppb
4,760x
EWG's Health Guideline:
0.001 ppb
0.001 ppb
This Utility: 13.2 ppt
Legal Limit: 4 ppb
44x
EWG's Health Guideline:
0.3 ppb
0.3 ppb
Perfluorooctanoic acid (PFOA)
Potential Effect: cancer
This Utility: 3.57 ppt
Legal Limit: 4 ppb
40x
EWG's Health Guideline:
0.09 ppb
0.09 ppb
Tetrachloroethylene (perchloroethylene)
Potential Effect: cancer
This Utility: 1.12 ppb
Legal Limit: 5 ppb
19x
EWG's Health Guideline:
0.06 ppb
0.06 ppb
Total trihalomethanes (TTHMs)
Potential Effect: cancer
This Utility: 28 ppb
Legal Limit: 80 ppb
187x
EWG's Health Guideline:
0.15 ppb
0.15 ppb
Trichloroacetic acid
Potential Effect: cancer
This Utility: 2.53 ppb
No Legal Limit
25x
EWG's Health Guideline:
0.1 ppb
0.1 ppb
This Utility: 0.0237 ppb
No Legal Limit
This Utility: 0.0411 ppb
No Legal Limit
This Utility: 0.6 ppb
Legal Limit: 100 ppb
This Utility: 0.062 ppt
No Legal Limit
EWG's Health Guideline:
1 ppt
1 ppt
This Utility: 0.053 ppt
No Legal Limit
EWG's Health Guideline:
1 ppt
1 ppt
This Utility: 0.9 ppt
No Legal Limit
EWG's Health Guideline:
2000 ppt
2000 ppt
This Utility: 2.73 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
This Utility: 0.218 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
This Utility: 0.811 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
This Utility: 0.963 ppt
No Legal Limit
EWG's Health Guideline:
1000 ppt
1000 ppt
Find a Filter
See which water filtration technologies are effective at reducing the contaminants detected in this utility's water supply.
Carbon Filters
Filters 16 contaminants exceeding guidelines (+11 others)
Can reduce the levels of many common contaminants.
Pros
- Lower upfront cost
- Reduced maintenance
Cons
- Does not remove all contaminants
Reverse Osmosis
Filters 20 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 | |||
| 1,4-Dioxane | ✕ | ✓ | ✕ |
| Arsenic | ✕ | ✓ | ✓ |
| Benzene | ✓ | ✓ | ✕ |
| Bromodichloromethane | ✓ | ✓ | ✕ |
| Bromoform | ✓ | ✓ | ✕ |
| Chloroform | ✓ | ✓ | ✕ |
| Chromium (hexavalent)* | ✕ | ✓ | ✓ |
| Dibromoacetic acid | ✓ | ✓ | ✕ |
| Dibromochloromethane | ✓ | ✓ | ✕ |
| Dichloroacetic acid | ✓ | ✓ | ✕ |
| Haloacetic acids (HAA5) | ✓ | ✓ | ✕ |
| Haloacetic acids (HAA9)* | ✓ | ✓ | ✕ |
| Nitrate | ✕ | ✓ | ✓ |
| Perfluorohexane sulfonate (PFHXS) | ✓ | ✓ | ✕ |
| Perfluorooctane sulfonate (PFOS) | ✓ | ✓ | ✕ |
| Perfluorooctanoic acid (PFOA) | ✓ | ✓ | ✕ |
| Tetrachloroethylene (perchloroethylene) | ✓ | ✓ | ✕ |
| Total trihalomethanes (TTHMs) | ✓ | ✓ | ✕ |
| Trichloroacetic acid | ✓ | ✓ | ✕ |
| Trichloroethylene | ✓ | ✓ | ✕ |
| Other Contaminants Detected | |||
| 1,1-Dichloroethane | ✓ | ✓ | ✕ |
| Barium | ✕ | ✓ | ✓ |
| Bromochloromethane | ✓ | ✓ | ✕ |
| Bromomethane | ✓ | ✓ | ✕ |
| Chlorate* | ✕ | ✕ | ✕ |
| Chlorodifluoromethane | ✕ | ✕ | ✕ |
| Chloromethane | ✓ | ✓ | ✕ |
| Chromium (total) | ✕ | ✓ | ✓ |
| Cobalt | ✕ | ✓ | ✓ |
| Fluoride | ✕ | ✓ | ✕ |
| Lithium | ✕ | ✓ | ✓ |
| Manganese | ✕ | ✕ | ✓ |
| Mercury (inorganic) | ✓ | ✓ | ✕ |
| Molybdenum | ✕ | ✓ | ✓ |
| N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) | ✓ | ✓ | ✕ |
| Perfluorobutane sulfonate (PFBS) | ✓ | ✓ | ✕ |
| Perfluorobutanoic Acid (PFBA) | ✓ | ✓ | ✕ |
| Perfluoroheptanoic acid (PFHPA) | ✓ | ✓ | ✕ |
| Perfluorohexanoic Acid (PFHxA) | ✓ | ✓ | ✕ |
| Perfluoropentanoic Acid (PFPeA) | ✓ | ✓ | ✕ |
| Selenium | ✕ | ✓ | ✕ |
| Strontium* | ✕ | ✓ | ✓ |
| 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.