Tetrachloroethylene (perchloroethylene)

Ridgewood Water

Dry cleaning chemical tetrachloroethylene, or perc, can cause cancer. It pollutes soil and groundwater due to emissions from dry cleaning facilities, and automotive, metalworking and other industries. Read More.

The EPA considers tetrachloroethylene a likely human carcinogen. It has been linked with increased incidence of lung, breast and colon cancers. Tetrachloroethylene also damages the liver, kidneys and central nervous system. The California public health goal of 0.06 parts per billion, set to protect against cancer, is 80 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 5 parts per billion.

Click here to read more about carcinogenic VOCs.

MORE ABOUT THIS CONTAMINANT

1,069

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2018	0.0328 ppb	204	10	ND - 3.68 ppb
2019	0.0163 ppb	200	9	ND - 0.654 ppb
2020	0.0259 ppb	230	3	ND - 5.53 ppb
2021	ND	192	0	ND
2022	0.00142 ppb	141	1	ND - 0.200 ppb
2023	ND	102	0	ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for tetrachloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL): 5 ppb

The legal limit for tetrachloroethylene, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer due to tetrachloroethylene exposure.

ppb = parts per billion

All test results

Date	Lab ID	Result
2018-01-09	8010170-01	ND
2018-01-09	8010170-06	ND
2018-01-09	8010170-04	ND
2018-01-09	8010170-07	0.297 ppb
2018-01-09	8010170-03	ND
2018-01-09	8010170-08	ND
2018-01-09	8010170-11	ND
2018-01-09	8010170-13	ND
2018-01-09	8010170-15	0.430 ppb
2018-01-09	8010170-09	ND
2018-01-22	8010636-04	ND
2018-01-22	8010636-08	ND
2018-01-22	8010636-01	ND
2018-01-22	8010636-11	ND
2018-01-22	8010636-09	ND
2018-01-23	8010636-02	ND
2018-02-05	8020227-01	ND
2018-02-05	8020227-03	ND
2018-02-05	8020227-04	ND
2018-02-05	8020227-07	ND
2018-02-05	8020227-08	ND
2018-02-05	8020227-05	ND
2018-02-05	8020087-01	ND
2018-02-20	8020661-01	ND
2018-02-20	8020661-03	ND
2018-02-20	8020661-07	ND
2018-02-20	8020661-04	ND
2018-02-20	8020661-06	ND
2018-03-05	8030194-01	ND
2018-03-05	8030194-03	ND
2018-03-05	8030194-04	ND
2018-03-05	8030194-08	ND
2018-03-05	8030194-09	ND
2018-03-05	8030194-05	ND
2018-03-05	8030194-07	ND
2018-03-19	8030542-01	ND
2018-03-19	8030542-03	ND
2018-03-19	8030542-07	ND
2018-03-19	8030542-04	ND
2018-04-02	8040078-01	ND
2018-04-02	8040078-06	ND
2018-04-02	8040078-04	ND
2018-04-02	8040078-07	ND
2018-04-02	8040078-08	0.390 ppb
2018-04-02	8040078-11	ND
2018-04-02	8040078-13	ND
2018-04-02	8040078-15	ND
2018-04-02	8040078-09	ND
2018-04-03	8040078-03	ND
2018-04-04	8040074-04	ND
2018-04-04	8040074-06	ND
2018-04-16	8040655-15	ND
2018-04-16	8040655-20	3.68 ppb
2018-04-17	8040655-01	ND
2018-04-17	8040655-05	ND
2018-04-17	8040655-04	ND
2018-04-17	8040655-09	ND
2018-04-17	8040655-03	ND
2018-04-17	8040655-10	0.280 ppb
2018-04-17	8040655-13	ND
2018-04-17	8040655-11	ND
2018-04-26	8040946-05	ND
2018-04-26	8040946-01	ND
2018-05-08	8050423-01	ND
2018-05-08	8050423-03	ND
2018-05-08	8050423-04	ND
2018-05-08	8050423-12	ND
2018-05-08	8050423-05	ND
2018-05-08	8050423-07	ND
2018-05-08	8050423-09	ND
2018-05-21	8051009-01	ND
2018-05-21	8051009-03	ND
2018-05-21	8051009-04	ND
2018-05-21	8051009-06	ND
2018-05-22	8051009-09	ND
2018-06-04	8060248-03	ND
2018-06-04	8060248-04	ND
2018-06-04	8060248-07	ND
2018-06-04	8060248-08	ND
2018-06-04	8060248-05	ND
2018-06-04	8060248-12	ND
2018-06-12	8060854-01	ND
2018-06-18	8060855-01	ND
2018-06-18	8060855-03	ND
2018-06-18	8060855-04	ND
2018-06-18	8060855-07	ND
2018-06-18	8060855-08	ND
2018-06-18	8060855-10	ND
2018-06-18	8060855-05	ND
2018-06-18	8060855-12	ND
2018-06-19	8060855-15	ND
2018-07-09	8070447-24	ND
2018-07-09	8070447-01	ND
2018-07-09	8070447-18	ND
2018-07-09	8070447-21	ND
2018-07-09	8070447-09	ND
2018-07-09	8070447-08	0.270 ppb
2018-07-09	8070447-10	ND
2018-07-09	8070447-13	ND
2018-07-09	8070447-02	ND
2018-07-09	8070447-07	0.305 ppb
2018-07-09	8070447-22	ND
2018-07-09	8070447-05	ND
2018-07-09	8070447-15	ND
2018-07-23	8071038-20	ND
2018-07-23	8071038-15	ND
2018-07-23	8071038-03	ND
2018-07-23	8071038-17	ND
2018-07-23	8071038-07	ND
2018-07-23	8071038-11	ND
2018-07-23	8071038-06	ND
2018-07-23	8071038-09	ND
2018-07-23	8071038-01	ND
2018-07-23	8071038-18	ND
2018-07-23	8071038-04	ND
2018-07-23	8071038-12	ND
2018-07-23	8071038-02	ND
2018-07-24	8071038-05	0.350 ppb
2018-08-06	8080365-13	ND
2018-08-06	8080365-09	ND
2018-08-06	8080365-03	ND
2018-08-06	8080365-04	ND
2018-08-06	8080365-01	ND
2018-08-06	8080365-12	ND
2018-08-06	8080365-02	ND
2018-08-06	8080365-06	ND
2018-08-08	8080365-11	0.299 ppb
2018-08-20	8080919-11	ND
2018-08-20	8080919-07	ND
2018-08-20	8080919-02	ND
2018-08-20	8080919-03	ND
2018-08-20	8080919-09	ND
2018-08-20	8080919-01	ND
2018-08-20	8080919-04	ND
2018-09-04	8090137-14	ND
2018-09-04	8090137-09	ND
2018-09-04	8090137-11	ND
2018-09-04	8090137-03	ND
2018-09-04	8090137-04	ND
2018-09-04	8090137-01	ND
2018-09-04	8090137-12	ND
2018-09-04	8090137-02	ND
2018-09-04	8090137-06	ND
2018-09-06	8090341-01	ND
2018-09-17	8090763-10	ND
2018-09-17	8090763-06	ND
2018-09-17	8090763-02	ND
2018-09-17	8090763-08	ND
2018-09-17	8090763-01	ND
2018-09-17	8090763-03	ND
2018-10-01	8100085-20	ND
2018-10-01	8100085-12	ND
2018-10-01	8100085-21	ND
2018-10-01	8100085-34	ND
2018-10-01	8100085-05	ND
2018-10-01	8100085-01	ND
2018-10-01	8100085-27	ND
2018-10-01	8100085-31	ND
2018-10-01	8100085-29	ND
2018-10-01	8100085-17	ND
2018-10-01	8100085-16	ND
2018-10-01	8100085-18	ND
2018-10-01	8100085-23	ND
2018-10-01	8100085-09	ND
2018-10-01	8100085-15	0.384 ppb
2018-10-01	8100085-32	ND
2018-10-01	8100085-13	ND
2018-10-01	8100085-24	ND
2018-10-15	8100636-10	ND
2018-10-15	8100636-06	ND
2018-10-15	8100636-02	ND
2018-10-15	8100636-08	ND
2018-10-15	8100636-01	ND
2018-10-15	8100636-03	ND
2018-11-05	8110300-14	ND
2018-11-05	8110300-09	ND
2018-11-05	8110300-11	ND
2018-11-05	8110300-03	ND
2018-11-05	8110300-04	ND
2018-11-05	8110300-01	ND
2018-11-05	8110300-12	ND
2018-11-05	8110300-02	ND
2018-11-05	8110300-06	ND
2018-11-19	8110782-11	ND
2018-11-19	8110782-08	ND
2018-11-19	8110782-03	ND
2018-11-19	8110782-09	ND
2018-11-19	8110782-02	ND
2018-11-19	8110782-04	ND
2018-12-04	8120052-14	ND
2018-12-04	8120052-09	ND
2018-12-04	8120052-11	ND
2018-12-04	8120052-03	ND
2018-12-04	8120052-04	ND
2018-12-04	8120052-01	ND
2018-12-04	8120052-12	ND
2018-12-04	8120052-02	ND
2018-12-04	8120052-06	ND
2018-12-18	8120617-10	ND
2018-12-18	8120617-07	ND
2018-12-18	8120617-02	ND
2018-12-18	8120617-08	ND
2018-12-18	8120617-01	ND
2018-12-18	8120617-03	ND
2019-01-09	9010352-22	ND
2019-01-09	9010352-24	ND
2019-01-09	9010352-17	ND
2019-01-09	9010352-19	ND
2019-01-09	9010352-07	ND
2019-01-09	9010352-08	ND
2019-01-09	9010352-11	ND
2019-01-09	9010352-01	ND
2019-01-09	9010352-06	0.486 ppb
2019-01-09	9010352-20	ND
2019-01-09	9010352-04	ND
2019-01-09	9010352-14	ND
2019-01-22	9010748-13	ND
2019-01-22	9010748-10	ND
2019-01-22	9010748-03	ND
2019-01-22	9010748-01	ND
2019-01-22	9010748-04	ND
2019-01-22	9010748-05	ND
2019-01-22	9010748-11	ND
2019-01-22	9010748-02	ND
2019-01-22	9010748-06	ND
2019-02-05	9020116-15	ND
2019-02-05	9020116-10	ND
2019-02-05	9020116-12	ND
2019-02-05	9020116-04	ND
2019-02-05	9020116-05	ND
2019-02-05	9020116-02	ND
2019-02-05	9020116-13	ND
2019-02-05	9020116-03	ND
2019-02-05	9020116-06	ND
2019-02-20	9020722-09	ND
2019-02-20	9020722-06	ND
2019-02-20	9020722-02	ND
2019-02-20	9020722-07	ND
2019-02-20	9020722-01	ND
2019-02-20	9020722-03	0.654 ppb
2019-03-05	9030122-14	ND
2019-03-05	9030122-09	ND
2019-03-05	9030122-11	ND
2019-03-05	9030122-03	ND
2019-03-05	9030122-04	ND
2019-03-05	9030122-01	ND
2019-03-05	9030122-12	ND
2019-03-05	9030122-02	0.252 ppb
2019-03-07	9030264-01	ND
2019-03-19	9030846-09	ND
2019-03-19	9030846-06	ND
2019-03-19	9030846-13	ND
2019-03-19	9030846-02	ND
2019-03-19	9030846-07	ND
2019-03-19	9030846-12	ND
2019-03-19	9030846-01	ND
2019-03-19	9030846-03	ND
2019-04-01	9040096-31	ND
2019-04-01	9040096-01	ND
2019-04-01	9040096-26	ND
2019-04-01	9040096-28	ND
2019-04-01	9040096-13	ND
2019-04-01	9040096-12	ND
2019-04-01	9040096-14	ND
2019-04-01	9040096-16	ND
2019-04-01	9040096-05	ND
2019-04-01	9040096-11	0.258 ppb
2019-04-01	9040096-29	ND
2019-04-01	9040096-09	ND
2019-04-01	9040096-22	ND
2019-04-02	9040096-33	ND
2019-04-16	9040694-09	ND
2019-04-16	9040694-06	ND
2019-04-16	9040694-01	ND
2019-04-16	9040694-07	ND
2019-04-16	9040694-11	ND
2019-04-16	9040694-02	ND
2019-04-24	9050156-01	ND
2019-05-06	9050360-13	ND
2019-05-06	9050360-10	ND
2019-05-06	9050360-03	ND
2019-05-06	9050360-04	ND
2019-05-06	9050360-01	ND
2019-05-06	9050360-11	ND
2019-05-06	9050360-02	ND
2019-05-06	9050360-06	ND
2019-05-20	9051000-01	ND
2019-05-20	9051000-04	ND
2019-05-20	9051000-03	0.294 ppb
2019-05-20	9051000-06	ND
2019-06-03	9060211-01	ND
2019-06-03	9060211-03	ND
2019-06-03	9060211-06	ND
2019-06-03	9060211-08	ND
2019-06-03	9060211-10	ND
2019-06-03	9060211-04	ND
2019-06-03	9060211-07	0.281 ppb
2019-06-03	9060211-12	ND
2019-06-18	9060780-09	ND
2019-06-18	9060780-02	ND
2019-06-18	9060780-07	ND
2019-06-18	9060780-03	ND
2019-06-21	9061046-01	ND
2019-07-02	9070243-26	ND
2019-07-02	9070243-02	ND
2019-07-02	9070243-08	ND
2019-07-02	9070243-23	ND
2019-07-02	9070243-15	ND
2019-07-02	9070243-18	ND
2019-07-02	9070243-01	ND
2019-07-02	9070243-12	ND
2019-07-02	9070243-13	ND
2019-07-02	9070243-16	ND
2019-07-02	9070243-03	ND
2019-07-02	9070243-11	ND
2019-07-02	9070243-24	ND
2019-07-02	9070243-09	ND
2019-07-02	9070243-19	ND
2019-07-02	9070243-07	ND
2019-07-15	9070909-01	ND
2019-07-15	9070909-06	ND
2019-07-15	9070909-03	ND
2019-07-15	9070909-05	ND
2019-07-15	9070909-08	ND
2019-08-05	9080354-13	ND
2019-08-05	9080354-10	ND
2019-08-05	9080354-03	ND
2019-08-05	9080354-04	ND
2019-08-05	9080354-01	ND
2019-08-05	9080354-11	ND
2019-08-05	9080354-02	ND
2019-08-05	9080354-07	ND
2019-08-20	9081074-01	ND
2019-08-20	9081074-06	ND
2019-08-20	9081074-12	ND
2019-08-20	9081074-03	ND
2019-08-20	9081074-11	ND
2019-08-20	9081074-05	ND
2019-08-20	9081074-08	ND
2019-09-03	9090228-13	ND
2019-09-03	9090228-10	ND
2019-09-03	9090228-03	ND
2019-09-03	9090228-04	ND
2019-09-03	9090228-01	ND
2019-09-03	9090228-11	ND
2019-09-03	9090228-02	ND
2019-09-03	9090228-06	ND
2019-09-16	9090747-01	ND
2019-09-16	9090747-06	ND
2019-09-16	9090747-03	ND
2019-09-16	9090747-05	ND
2019-09-16	9090747-08	ND
2019-09-19	9090883-01	ND
2019-10-01	9100101-23	ND
2019-10-01	9100101-03	ND
2019-10-01	9100101-20	ND
2019-10-01	9100101-11	ND
2019-10-01	9100101-12	ND
2019-10-01	9100101-14	ND
2019-10-01	9100101-04	ND
2019-10-01	9100101-10	0.409 ppb
2019-10-01	9100101-21	ND
2019-10-01	9100101-08	ND
2019-10-01	9100101-16	ND
2019-10-01	9100101-01	ND
2019-10-21	9101098-06	ND
2019-10-21	9101098-07	ND
2019-10-21	9101098-01	ND
2019-10-21	9101098-08	ND
2019-10-21	9101098-12	ND
2019-10-21	9101098-09	ND
2019-10-21	9101098-11	ND
2019-10-21	9101098-14	ND
2019-10-23	9101098-18	ND
2019-10-30	9101420-01	ND
2019-11-04	9110301-14	ND
2019-11-04	9110301-11	ND
2019-11-04	9110301-04	ND
2019-11-04	9110301-05	ND
2019-11-04	9110301-02	ND
2019-11-04	9110301-12	ND
2019-11-04	9110301-03	ND
2019-11-04	9110301-08	0.374 ppb
2019-11-04	9110301-01	ND
2019-11-18	9110919-01	ND
2019-11-18	9110919-06	ND
2019-11-18	9110919-03	ND
2019-11-18	9110919-05	ND
2019-11-18	9110919-08	0.255 ppb
2019-11-18	9110919-11	ND
2019-12-03	9120098-01	ND
2019-12-03	9120098-03	ND
2019-12-03	9120098-08	ND
2019-12-03	9120098-10	ND
2019-12-03	9120098-04	ND
2019-12-03	9120098-11	ND
2019-12-04	9120098-06	ND
2019-12-04	9120098-07	ND
2019-12-16	9120767-01	ND
2019-12-16	9120767-03	ND
2019-12-16	9120767-07	ND
2019-12-16	9120767-04	ND
2019-12-16	9120767-06	ND
2019-12-16	9120767-08	ND
2020-01-07	0010331-01	ND
2020-01-07	0010331-04	ND
2020-01-07	0010331-06	ND
2020-01-07	0010331-22	ND
2020-01-07	0010331-03	ND
2020-01-07	0010331-11	ND
2020-01-07	0010331-13	ND
2020-01-07	0010331-23	ND
2020-01-07	0010331-16	ND
2020-01-07	0010331-15	ND
2020-01-07	0010331-07	ND
2020-01-07	0010331-09	ND
2020-01-07	0010331-20	ND
2020-01-13	0010487-01	5.53 ppb
2020-01-21	0010912-03	ND
2020-01-21	0010912-07	ND
2020-01-21	0010912-01	ND
2020-01-21	0010912-13	ND
2020-01-21	0010912-10	ND
2020-01-21	0010912-12	ND
2020-01-21	0010912-14	ND
2020-01-29	0011116-01	ND
2020-02-03	0020024-01	ND
2020-02-03	0020024-03	ND
2020-02-03	0020024-05	ND
2020-02-03	0020024-08	ND
2020-02-03	0020024-10	ND
2020-02-03	0020024-12	ND
2020-02-03	0020024-06	ND
2020-02-03	0020024-09	ND
2020-02-03	0020024-13	ND
2020-02-18	0020795-01	ND
2020-02-18	0020795-03	ND
2020-02-18	0020795-08	ND
2020-02-18	0020795-05	ND
2020-02-18	0020795-07	ND
2020-02-18	0020795-09	ND
2020-03-02	0030170-01	ND
2020-03-02	0030170-03	ND
2020-03-02	0030170-05	ND
2020-03-02	0030170-08	ND
2020-03-02	0030170-10	ND
2020-03-02	0030170-12	ND
2020-03-02	0030170-06	ND
2020-03-02	0030170-09	ND
2020-03-02	0030170-13	ND
2020-03-23	0031038-01	ND
2020-03-23	0031038-03	ND
2020-03-23	0031038-08	ND
2020-03-23	0031038-05	ND
2020-03-23	0031038-07	ND
2020-03-23	0031038-09	ND
2020-04-01	0040022-01	ND
2020-04-01	0040022-03	ND
2020-04-01	0040022-07	ND
2020-04-01	0040022-08	0.190 ppb
2020-04-01	0040022-13	ND
2020-04-01	0040022-15	ND
2020-04-01	0040022-18	ND
2020-04-01	0040022-17	ND
2020-04-01	0040022-09	ND
2020-04-01	0040022-11	ND
2020-04-01	0040022-22	ND
2020-04-13	0040515-01	ND
2020-04-13	0040515-03	ND
2020-04-13	0040515-08	ND
2020-04-13	0040515-05	ND
2020-04-13	0040515-07	ND
2020-04-14	0040514-02	ND
2020-04-21	0040783-01	ND
2020-04-22	0040782-01	ND
2020-04-29	0040968-01	ND
2020-05-04	0050065-01	ND
2020-05-04	0050065-03	ND
2020-05-04	0050065-05	ND
2020-05-04	0050065-08	ND
2020-05-04	0050065-10	ND
2020-05-04	0050065-12	ND
2020-05-04	0050065-06	ND
2020-05-04	0050065-09	ND
2020-05-04	0050065-14	ND
2020-05-04	0050065-17	ND
2020-05-18	0050775-12	ND
2020-05-18	0050775-08	ND
2020-05-18	0050775-03	ND
2020-05-18	0050775-10	ND
2020-05-18	0050775-02	ND
2020-05-18	0050775-04	ND
2020-05-18	0050775-01	ND
2020-06-08	0060454-01	ND
2020-06-08	0060454-03	ND
2020-06-08	0060454-05	ND
2020-06-08	0060454-08	ND
2020-06-08	0060454-10	ND
2020-06-08	0060454-12	ND
2020-06-08	0060454-06	ND
2020-06-08	0060454-09	ND
2020-06-08	0060454-14	ND
2020-06-10	0060454-17	ND
2020-06-22	0061072-01	ND
2020-06-22	0061072-03	ND
2020-06-22	0061072-08	ND
2020-06-22	0061072-05	ND
2020-06-22	0061072-07	ND
2020-06-22	0061072-10	ND
2020-06-22	0061072-13	ND
2020-06-24	0061069-01	ND
2020-06-29	0061253-01	ND
2020-06-29	0061254-01	ND
2020-07-06	0070304-30	ND
2020-07-06	0070304-01	ND
2020-07-06	0070304-08	ND
2020-07-06	0070304-04	ND
2020-07-06	0070304-09	ND
2020-07-06	0070304-03	ND
2020-07-06	0070304-10	0.231 ppb
2020-07-06	0070304-15	ND
2020-07-06	0070304-17	ND
2020-07-06	0070304-20	ND
2020-07-06	0070304-19	ND
2020-07-06	0070304-11	ND
2020-07-06	0070304-13	ND
2020-07-06	0070304-25	ND
2020-07-06	0070304-28	ND
2020-07-20	0070912-02	ND
2020-07-20	0070912-07	ND
2020-07-20	0070912-06	ND
2020-07-20	0070912-09	ND
2020-07-20	0070912-13	ND
2020-07-20	0070912-14	ND
2020-07-20	0070912-10	ND
2020-07-20	0070912-12	ND
2020-07-20	0070912-18	ND
2020-07-20	0070912-16	ND
2020-07-20	0070912-15	ND
2020-07-20	0070912-21	ND
2020-08-03	0080058-01	ND
2020-08-03	0080058-03	ND
2020-08-03	0080058-19	ND
2020-08-03	0080058-05	ND
2020-08-03	0080058-08	ND
2020-08-03	0080058-10	ND
2020-08-03	0080058-12	ND
2020-08-03	0080058-06	ND
2020-08-03	0080058-09	ND
2020-08-03	0080058-14	ND
2020-08-03	0080058-17	ND
2020-08-17	0080754-01	ND
2020-08-17	0080754-03	ND
2020-08-17	0080754-08	ND
2020-08-17	0080754-05	ND
2020-08-17	0080754-07	ND
2020-08-17	0080754-10	ND
2020-08-17	0080754-13	ND
2020-09-01	0090178-01	ND
2020-09-01	0090178-03	ND
2020-09-01	0090178-05	ND
2020-09-01	0090178-09	ND
2020-09-01	0090178-10	ND
2020-09-01	0090178-12	ND
2020-09-01	0090178-06	ND
2020-09-01	0090178-08	ND
2020-09-01	0090178-14	ND
2020-09-01	0090178-17	ND
2020-09-14	0090668-02	ND
2020-09-14	0090668-04	ND
2020-09-14	0090668-09	ND
2020-09-14	0090668-06	ND
2020-09-14	0090668-08	ND
2020-09-14	0090668-11	ND
2020-09-14	0090668-14	ND
2020-10-01	0100027-27	ND
2020-10-01	0100027-26	ND
2020-10-01	0100027-01	ND
2020-10-01	0100027-08	ND
2020-10-01	0100027-04	ND
2020-10-01	0100027-09	ND
2020-10-01	0100027-03	ND
2020-10-01	0100027-10	ND
2020-10-01	0100027-15	ND
2020-10-01	0100027-17	ND
2020-10-01	0100027-19	ND
2020-10-01	0100027-11	ND
2020-10-01	0100027-13	ND
2020-10-01	0100027-21	ND
2020-10-01	0100027-24	ND
2020-10-06	0100217-01	ND
2020-10-13	0100596-12	ND
2020-10-13	0100596-08	ND
2020-10-13	0100596-03	ND
2020-10-13	0100596-01	ND
2020-10-13	0100596-02	ND
2020-10-16	0100832-01	ND
2020-10-19	0100833-01	ND
2020-10-19	0100833-03	ND
2020-10-19	0100833-08	ND
2020-10-19	0100833-05	ND
2020-10-19	0100833-07	ND
2020-10-19	0100833-10	ND
2020-11-02	0110061-01	ND
2020-11-02	0110061-03	ND
2020-11-02	0110061-05	ND
2020-11-02	0110061-08	ND
2020-11-02	0110061-10	ND
2020-11-02	0110061-12	ND
2020-11-02	0110061-06	ND
2020-11-02	0110061-09	ND
2020-11-02	0110061-14	ND
2020-11-02	0110061-17	ND
2020-11-15	0110843-01	ND
2020-11-15	0110843-03	ND
2020-11-15	0110843-07	ND
2020-11-15	0110843-05	ND
2020-11-15	0110843-13	ND
2020-11-15	0110843-09	ND
2020-11-15	0110843-12	ND
2020-12-01	0120101-01	ND
2020-12-01	0120101-03	ND
2020-12-01	0120101-05	ND
2020-12-01	0120101-08	ND
2020-12-01	0120101-10	ND
2020-12-01	0120101-06	ND
2020-12-01	0120101-09	ND
2020-12-01	0120101-12	ND
2020-12-14	0120811-02	ND
2020-12-14	0120811-04	ND
2020-12-14	0120811-09	ND
2020-12-14	0120811-06	ND
2020-12-14	0120811-08	ND
2020-12-14	0120811-10	ND
2021-01-04	1010023-15	ND
2021-01-04	1010023-08	ND
2021-01-04	1010023-12	ND
2021-01-04	1010023-04	ND
2021-01-04	1010023-05	ND
2021-01-04	1010023-07	ND
2021-01-04	1010023-03	ND
2021-01-04	1010023-13	ND
2021-01-04	1010023-01	ND
2021-01-19	1010909-07	ND
2021-01-19	1010909-03	ND
2021-01-19	1010909-02	ND
2021-01-19	1010909-04	ND
2021-01-19	1010909-05	ND
2021-01-19	1010909-01	ND
2021-01-21	1010910-01	ND
2021-02-01	1020102-01	ND
2021-02-01	1020102-03	ND
2021-02-01	1020102-05	ND
2021-02-01	1020102-11	ND
2021-02-01	1020102-08	ND
2021-02-01	1020102-06	ND
2021-02-01	1020102-10	ND
2021-02-16	1020690-08	ND
2021-02-16	1020690-04	ND
2021-02-16	1020690-03	ND
2021-02-16	1020690-06	ND
2021-02-16	1020690-02	ND
2021-03-01	1030222-11	ND
2021-03-01	1030222-06	ND
2021-03-01	1030222-08	ND
2021-03-01	1030222-03	ND
2021-03-01	1030222-04	ND
2021-03-01	1030222-09	ND
2021-03-01	1030222-02	ND
2021-03-15	1030940-01	ND
2021-03-15	1030940-03	ND
2021-03-15	1030940-07	ND
2021-03-15	1030940-05	ND
2021-03-15	1030940-08	ND
2021-04-05	1040397-01	ND
2021-04-05	1040397-03	ND
2021-04-05	1040397-07	ND
2021-04-05	1040397-08	ND
2021-04-05	1040397-11	ND
2021-04-05	1040397-13	ND
2021-04-05	1040397-15	ND
2021-04-05	1040397-09	ND
2021-04-05	1040397-16	ND
2021-04-15	1040734-01	ND
2021-04-15	1040734-05	ND
2021-04-15	1040734-06	ND
2021-04-19	1041045-01	ND
2021-04-19	1041045-03	ND
2021-04-19	1041045-07	ND
2021-04-19	1041045-05	ND
2021-04-19	1041045-08	ND
2021-04-22	1041044-01	ND
2021-05-03	1050311-10	ND
2021-05-03	1050311-05	ND
2021-05-03	1050311-07	ND
2021-05-03	1050311-02	ND
2021-05-03	1050311-03	ND
2021-05-03	1050311-12	ND
2021-05-03	1050311-08	ND
2021-05-03	1050311-01	ND
2021-05-17	1051067-01	ND
2021-05-17	1051067-03	ND
2021-05-17	1051067-07	ND
2021-05-17	1051067-05	ND
2021-05-17	1051069-01	ND
2021-05-20	1051068-01	ND
2021-05-24	1051089-01	ND
2021-06-01	1060210-12	ND
2021-06-01	1060210-07	ND
2021-06-01	1060210-09	ND
2021-06-01	1060210-04	ND
2021-06-01	1060210-05	ND
2021-06-01	1060210-02	ND
2021-06-01	1060210-10	ND
2021-06-01	1060210-14	ND
2021-06-01	1060210-01	ND
2021-06-07	1060299-01	ND
2021-06-14	1060919-11	ND
2021-06-14	1060919-07	ND
2021-06-14	1060919-02	ND
2021-06-14	1060919-09	ND
2021-06-14	1060919-03	ND
2021-06-14	1060919-01	ND
2021-07-06	1070178-26	ND
2021-07-06	1070178-03	ND
2021-07-06	1070178-19	ND
2021-07-06	1070178-23	ND
2021-07-06	1070178-10	ND
2021-07-06	1070178-09	ND
2021-07-06	1070178-11	ND
2021-07-06	1070178-13	ND
2021-07-06	1070178-04	ND
2021-07-06	1070178-08	ND
2021-07-06	1070178-24	ND
2021-07-06	1070178-16	ND
2021-07-06	1070178-01	ND
2021-07-19	1071132-02	ND
2021-07-19	1071132-06	ND
2021-07-19	1071132-13	ND
2021-07-19	1071132-10	ND
2021-07-19	1071132-08	ND
2021-07-19	1071132-15	ND
2021-07-19	1071132-12	ND
2021-07-19	1071132-11	ND
2021-07-19	1071132-18	ND
2021-08-02	1080289-15	ND
2021-08-02	1080289-10	ND
2021-08-02	1080289-12	ND
2021-08-02	1080289-03	ND
2021-08-02	1080289-04	ND
2021-08-02	1080289-02	ND
2021-08-02	1080289-13	ND
2021-08-02	1080289-07	ND
2021-08-02	1080289-01	ND
2021-08-16	1081028-11	ND
2021-08-16	1081028-07	ND
2021-08-16	1081028-02	ND
2021-08-16	1081028-09	ND
2021-08-16	1081028-03	ND
2021-08-16	1081028-01	ND
2021-09-01	1090087-15	ND
2021-09-01	1090087-10	ND
2021-09-01	1090087-12	ND
2021-09-01	1090087-03	ND
2021-09-01	1090087-04	ND
2021-09-01	1090087-02	ND
2021-09-01	1090087-13	ND
2021-09-01	1090087-06	ND
2021-09-01	1090087-01	ND
2021-09-13	1090788-11	ND
2021-09-13	1090788-07	ND
2021-09-13	1090788-02	ND
2021-09-13	1090788-09	ND
2021-09-13	1090788-03	ND
2021-09-13	1090788-01	ND
2021-10-04	1100222-01	ND
2021-10-04	1100222-03	ND
2021-10-04	1100222-09	ND
2021-10-04	1100222-11	ND
2021-10-04	1100222-07	ND
2021-10-04	1100222-16	ND
2021-10-04	1100222-19	ND
2021-10-05	1100221-02	ND
2021-10-05	1100221-08	ND
2021-10-05	1100221-01	ND
2021-10-05	1100221-03	ND
2021-10-05	1100221-04	ND
2021-10-05	1100221-06	ND
2021-10-12	1100595-01	ND
2021-10-18	1101112-08	ND
2021-10-18	1101112-07	ND
2021-10-18	1101112-19	ND
2021-10-18	1101112-01	ND
2021-10-18	1101112-14	ND
2021-10-18	1101112-16	ND
2021-10-18	1101112-09	ND
2021-10-18	1101112-17	ND
2021-10-18	1101112-10	ND
2021-10-18	1101112-06	ND
2021-11-01	1110297-15	ND
2021-11-01	1110297-06	ND
2021-11-01	1110297-12	ND
2021-11-01	1110297-03	ND
2021-11-01	1110297-04	ND
2021-11-01	1110297-02	ND
2021-11-01	1110297-13	ND
2021-11-01	1110297-08	ND
2021-11-01	1110297-01	ND
2021-11-15	1110995-07	ND
2021-11-15	1110995-03	ND
2021-11-15	1110995-02	ND
2021-11-15	1110995-05	ND
2021-11-15	1110995-01	ND
2021-12-01	1120104-11	ND
2021-12-01	1120104-06	ND
2021-12-01	1120104-08	ND
2021-12-01	1120104-03	ND
2021-12-01	1120104-04	ND
2021-12-01	1120104-02	ND
2021-12-01	1120104-09	ND
2021-12-01	1120104-01	ND
2021-12-13	1121023-07	ND
2021-12-13	1121023-03	ND
2021-12-13	1121023-02	ND
2021-12-13	1121023-05	ND
2021-12-13	1121023-01	ND
2022-01-03	2010094-16	ND
2022-01-03	2010094-03	ND
2022-01-03	2010094-10	ND
2022-01-03	2010094-08	ND
2022-01-03	2010094-04	ND
2022-01-03	2010094-14	ND
2022-01-03	2010094-01	ND
2022-01-04	2010093-07	ND
2022-01-04	2010093-10	ND
2022-01-04	2010093-01	ND
2022-01-04	2010093-02	ND
2022-01-04	2010093-04	ND
2022-01-04	2010093-06	ND
2022-01-18	2010833-02	ND
2022-01-18	2010833-04	ND
2022-01-18	2010833-08	ND
2022-01-18	2010833-06	ND
2022-01-18	2010833-09	ND
2022-02-01	2020229-11	ND
2022-02-01	2020229-06	ND
2022-02-01	2020229-08	ND
2022-02-01	2020229-03	ND
2022-02-01	2020229-04	ND
2022-02-01	2020229-02	ND
2022-02-01	2020229-09	ND
2022-02-01	2020229-01	ND
2022-02-14	2020938-08	ND
2022-02-14	2020938-04	ND
2022-02-14	2020938-03	ND
2022-02-14	2020938-06	ND
2022-02-14	2020938-02	ND
2022-03-07	2030569-11	ND
2022-03-07	2030569-06	ND
2022-03-07	2030569-08	ND
2022-03-07	2030569-03	ND
2022-03-07	2030569-04	ND
2022-03-07	2030569-02	ND
2022-03-07	2030569-09	ND
2022-03-07	2030569-01	ND
2022-04-04	2040406-29	ND
2022-04-04	2040406-05	ND
2022-04-04	2040406-22	ND
2022-04-04	2040406-26	ND
2022-04-04	2040406-14	ND
2022-04-04	2040406-15	ND
2022-04-04	2040406-17	ND
2022-04-04	2040406-10	ND
2022-04-04	2040406-27	ND
2022-04-04	2040406-01	ND
2022-04-21	2041016-02	ND
2022-04-21	2041016-01	ND
2022-05-02	2050299-02	ND
2022-05-02	2050299-04	ND
2022-05-02	2050299-06	ND
2022-05-02	2050299-09	ND
2022-05-02	2050299-11	ND
2022-05-02	2050299-07	ND
2022-05-02	2050299-12	ND
2022-05-11	2050538-02	ND
2022-05-19	2051067-02	ND
2022-05-27	2051435-02	ND
2022-06-03	2060152-03	ND
2022-06-03	2060152-05	ND
2022-06-03	2060152-02	ND
2022-06-03	2060152-09	ND
2022-06-03	2060152-07	ND
2022-06-03	2060152-11	ND
2022-06-06	2060475-02	ND
2022-06-06	2060475-03	ND
2022-06-30	2061465-01	ND
2022-07-01	2070265-03	ND
2022-07-01	2070265-06	ND
2022-07-01	2070265-01	ND
2022-07-01	2070265-15	ND
2022-07-01	2070265-04	ND
2022-07-01	2070265-02	ND
2022-07-07	2070265-14	ND
2022-07-12	2070512-02	ND
2022-07-12	2070512-10	ND
2022-07-12	2070512-06	ND
2022-07-12	2070512-09	ND
2022-07-12	2070512-12	ND
2022-07-12	2070512-05	ND
2022-07-12	2070512-03	ND
2022-07-18	2071013-05	ND
2022-07-18	2071013-07	ND
2022-07-19	2071013-09	ND
2022-07-28	2071349-01	ND
2022-07-28	2071349-03	ND
2022-08-04	2080293-01	ND
2022-08-08	2080624-02	ND
2022-08-08	2080624-04	ND
2022-08-08	2080624-06	ND
2022-08-09	2080624-12	ND
2022-08-09	2080624-11	ND
2022-08-09	2080624-14	0.200 ppb
2022-08-09	2080624-08	ND
2022-08-09	2080624-07	ND
2022-08-22	2081113-02	ND
2022-08-25	2081273-02	ND
2022-09-06	2090360-02	ND
2022-09-07	2090360-05	ND
2022-09-07	2090360-07	ND
2022-09-07	2090360-09	ND
2022-09-07	2090360-19	ND
2022-09-08	2090360-12	ND
2022-09-08	2090360-11	ND
2022-09-09	2090360-16	ND
2022-09-09	2090360-14	ND
2022-10-03	2100151-06	ND
2022-10-03	2100151-08	ND
2022-10-03	2100151-03	ND
2022-10-03	2100151-02	ND
2022-10-05	2100151-14	ND
2022-10-05	2100151-11	ND
2022-10-06	2100279-04	ND
2022-10-06	2100279-02	ND
2022-10-06	2100279-05	ND
2022-10-07	2100326-05	ND
2022-10-07	2100326-02	ND
2022-10-07	2100326-08	ND
2022-10-07	2100326-04	ND
2022-10-27	2101157-02	ND
2022-11-01	2110184-02	ND
2022-11-01	2110184-04	ND
2022-11-01	2110184-06	ND
2022-11-01	2110184-08	ND
2022-11-01	2110184-07	ND
2022-11-03	2110184-17	ND
2022-11-03	2110184-13	ND
2022-11-03	2110184-12	ND
2022-11-03	2110184-15	ND
2022-11-28	2120015-03	ND
2022-11-28	2120015-01	ND
2022-11-28	2120015-04	ND
2022-11-29	2120023-03	ND
2022-12-01	2120030-06	ND
2022-12-01	2120030-08	ND
2022-12-01	2120017-01	ND
2022-12-01	2120030-02	ND
2022-12-01	2120030-05	ND
2023-01-05	23A0195-01	ND
2023-01-05	23A0195-03	ND
2023-01-05	23A0195-02	ND
2023-01-11	23A0480-05	ND
2023-01-11	23A0480-03	ND
2023-01-11	23A0480-01	ND
2023-01-12	23A0593-01	ND
2023-02-01	23B0128-10	ND
2023-02-01	23B0128-11	ND
2023-02-01	23B0128-06	ND
2023-02-01	23B0128-02	ND
2023-02-01	23B0128-08	ND
2023-02-08	23B0387-01	ND
2023-03-01	23C0107-01	ND
2023-03-01	23C0107-03	ND
2023-03-01	23C0107-04	ND
2023-03-01	23C0107-06	ND
2023-03-07	23C0439-02	ND
2023-03-13	23C0646-02	ND
2023-04-04	23D0217-09	ND
2023-04-04	23D0217-07	ND
2023-04-04	23D0217-03	ND
2023-04-04	23D0217-02	ND
2023-04-05	23D0217-19	ND
2023-04-05	23D0217-12	ND
2023-04-10	23D0395-02	ND
2023-04-26	23D1061-02	ND
2023-04-26	23D1061-01	ND
2023-05-01	23E0251-02	ND
2023-05-01	23E0251-04	ND
2023-05-01	23E0251-10	ND
2023-05-01	23E0251-06	ND
2023-05-02	23E0251-14	ND
2023-05-02	23E0251-12	ND
2023-05-02	23E0251-15	ND
2023-05-08	23E0358-02	ND
2023-05-12	23E0656-01	ND
2023-05-18	23E0896-02	ND
2023-05-18	23E0896-01	ND
2023-06-01	23F0078-02	ND
2023-06-01	23F0078-06	ND
2023-06-01	23F0078-04	ND
2023-06-02	23F0078-10	ND
2023-06-02	23F0078-16	ND
2023-06-02	23F0078-12	ND
2023-06-02	23F0078-15	ND
2023-06-02	23F0078-18	ND
2023-06-02	23F0078-13	ND
2023-06-05	23F0160-02	ND
2023-06-30	23F1522-02	ND
2023-07-06	23G0227-02	ND
2023-07-06	23G0227-06	ND
2023-07-06	23G0227-05	ND
2023-07-07	23G0247-03	ND
2023-07-07	23G0247-02	ND
2023-07-07	23G0247-04	ND
2023-07-10	23G0355-06	ND
2023-07-10	23G0355-03	ND
2023-07-10	23G0355-01	ND
2023-07-10	23G0355-10	ND
2023-07-11	23G0429-06	ND
2023-07-11	23G0429-07	ND
2023-07-11	23G0429-01	ND
2023-07-11	23G0429-04	ND
2023-07-11	23G0429-03	ND
2023-08-07	23H0765-02	ND
2023-08-07	23H0765-04	ND
2023-08-08	23H0765-15	ND
2023-08-08	23H0765-12	ND
2023-08-08	23H0765-10	ND
2023-08-08	23H0765-13	ND
2023-08-08	23H0765-07	ND
2023-08-08	23H0765-19	ND
2023-08-10	23H0765-18	ND
2023-09-11	23I0739-04	ND
2023-09-11	23I0739-02	ND
2023-09-12	23I0739-15	ND
2023-09-12	23I0739-14	ND
2023-09-12	23I0739-11	ND
2023-09-12	23I0739-09	ND
2023-09-12	23I0739-08	ND
2023-09-12	23I0739-12	ND
2023-10-02	23J0589-07	ND
2023-10-02	23J0589-06	ND
2023-10-02	23J0589-03	ND
2023-10-02	23J0589-02	ND
2023-10-03	23J0589-12	ND
2023-10-03	23J0589-11	ND
2023-10-03	23J0589-20	ND
2023-10-03	23J0589-18	ND
2023-10-03	23J0589-15	ND
2023-10-03	23J0589-22	ND
2023-10-03	23J0589-14	ND
2023-10-03	23J0589-09	ND
2023-11-01	23K0112-02	ND
2023-11-01	23K0112-04	ND
2023-11-01	23K0112-07	ND
2023-11-01	23K0112-05	ND
2023-11-01	23K0112-15	ND
2023-11-01	23K0112-08	ND
2023-11-01	23K0112-11	ND
2023-11-01	23K0112-10	ND

EWG’s Tap
Water Database

Nitrate in
Tap Water

Tetrachloroethylene (perchloroethylene)

Ridgewood Water

Testing results - average by year

State, National, and Health Guidelines for Drinking Water

All test results

EWG’s TapWater Database

Tetrachloroethylene (perchloroethylene)

Ridgewood Water

Testing results - average by year

State, National, and Health Guidelines for Drinking Water

All test results

EWG’s Tap
Water Database