The Power of Information

National Drinking Water Database

City of Columbus Department of Public Utilities Utilities - Columbus, OH

Serves 897,213 people


Phosphorus is a component of fertilizer and manure, and a common pollutant in municipal wastewater discharges.
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
33 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
33 days
Tests ConductedNumber of individual tests done for this contaminant
89 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
PhosphorusPhosphorus is a component of fertilizer and manure, and a common pollutant in municipal wastewater discharges.514.19 ppb
590 ppb
0.1 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Phosphorus

Health Based Limits for Phosphorus

Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.0.1 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.0.5 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-06-08506.67 ppb30490 to 520 ppb
2009-05-04473.33 ppb30430 to 520 ppb
2009-04-06523.33 ppb30480 to 550 ppb
2009-03-02490 ppb30440 to 520 ppb
2009-02-23550 ppb10550 ppb
2009-02-02490 ppb20470 to 510 ppb
2009-01-05480 ppb30480 ppb
2008-12-01503.33 ppb30480 to 530 ppb
2008-11-04520 ppb30490 to 550 ppb
2008-10-06513.33 ppb30500 to 520 ppb
2008-09-02516.67 ppb30490 to 540 ppb
2008-08-04513.33 ppb30500 to 530 ppb
2008-07-07500 ppb30450 to 550 ppb
2008-06-02516.67 ppb30510 to 520 ppb
2008-05-05506.67 ppb30490 to 540 ppb
2008-04-01550 ppb30520 to 600 ppb
2008-03-03520 ppb30470 to 590 ppb
2008-02-04480 ppb20480 ppb
2008-01-07523.33 ppb30480 to 580 ppb
2007-12-03493.33 ppb30460 to 560 ppb
2007-11-05526.67 ppb30490 to 570 ppb
2007-10-01533.33 ppb30500 to 570 ppb
2007-09-05543.33 ppb30520 to 570 ppb
2007-08-06536.67 ppb30510 to 560 ppb
2007-07-09520 ppb30510 to 530 ppb
2007-06-05520 ppb20510 to 530 ppb
2007-06-04590 ppb10590 ppb
2007-05-07526.67 ppb30510 to 540 ppb
2007-04-02496.67 ppb30480 to 510 ppb
2007-03-05500 ppb30490 to 510 ppb
2007-02-05500 ppb30470 to 530 ppb
2007-01-03500 ppb10500 ppb
2007-01-02505 ppb20490 to 520 ppb