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NR 809.245(9)(c) (c) If the concentration in the composite sample is greater than 0.0002 mg/L for vinyl chloride or 0.0005mg/L for any other contaminant listed under s. NR 809.24, then a follow-up sample shall be taken and analyzed for each contaminant detected within 14 days from each entry point included in the composite.
NR 809.245(9)(d) (d) If duplicates of the original sample taken from each sampling point used in the composite are available, the water supplier may use these instead of re-sampling. The duplicate shall be analyzed and the results reported to the department within 14 days of collection.
NR 809.245(10) (10)Increasing monitoring frequency. The department may increase monitoring requirements if necessary to detect contaminant variations within a public water system.
NR 809.245(11) (11)Designation of sampling times. Each public water system shall be monitored during the month, quarter or year designated by the department within each compliance period.
NR 809.245 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 15-049: am. (2) (a) 1., (b), (5), (7) (b), (9) (c) Register March 2016 No. 723, eff. 4-1-16.
NR 809.247 NR 809.247 Compliance requirements for volatile organic contaminants.
NR 809.247(1)(1)MCL compliance determination. Compliance with volatile organic contaminant MCLs shall be determined as follows:
NR 809.247(1)(a) (a) Compliance with the VOC MCLs specified in s. NR 809.24 shall be determined based on the analytical results obtained at each entry point. If one entry point is in violation of an MCL, the public water system is in violation of the MCL.
NR 809.247(1)(b) (b) For public water systems which are monitored more frequently than annually, compliance is determined by a running annual average of all samples taken at each entry point. If the annual average of any entry point is greater than the MCL, the public water system is out of compliance. If the initial sample or a subsequent sample would cause the annual average to exceed the MCL, the public water system is out of compliance immediately.
NR 809.247(1)(c) (c) If monitoring is conducted annually, or less frequently, the public water system is out of compliance if the level of a contaminant at any entry point is greater than the MCL. Compliance shall be based on the concentration of this sample or the average value of this sample and the confirmation sample, if the department required a confirmation sample.
NR 809.247(1)(d) (d) If a water supplier fails to collect the required number of samples, compliance shall be based on the total number of samples collected.
NR 809.247(1)(e) (e) Any concentration reported at or above the method detection limit for any contaminant listed in s. NR 809.24 shall be used in determining the averages in pars. (b) and (c). Any concentration reported below the method detection limit shall be calculated at zero for the purposes of determining the averages in pars. (b) and (c).
NR 809.247(2) (2)Detection of volatile contaminants not listed in s. NR 809.24. Any detection of a volatile organic contaminant not listed in s. NR 809.24 shall be reported to the department with the other monitoring reports required under this section. The laboratory shall indicate whether any detected volatile organic contaminant not listed in s. NR 809.24 has been confirmed or tentatively identified, and when a numerical result is reported, whether the result is quantitative or an estimate.
NR 809.247(3) (3)Separate distribution system notice. If a public water system has a distribution system separable from other parts of the distribution system with no interconnections, the department may allow the water supplier to give public notice to only that area served by that portion of the public water system which is out of compliance.
NR 809.247(4) (4)Use of analytical results. The department may determine compliance or initiate enforcement action based upon analytical results and other information compiled by its sanctioned representatives and agencies.
NR 809.247 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 15-049: am. (1) (c), (e), (4) Register March 2016 No. 723, eff. 4-1-16.
NR 809.25 NR 809.25 Special monitoring and reporting for selected organic contaminants and sulfate.
NR 809.25(1)(1)General.
NR 809.25(1)(a)(a) Community systems with populations of 10,000 and greater shall be monitored for the contaminants listed in pars. (e) and (f) on a schedule to be determined by the department. Community water systems with populations less than 10,000 and non-transient, non-community water systems shall be monitored for the contaminants listed in pars. (e) and (f) at the discretion of the department.
NR 809.25(1)(b) (b) Surface water systems shall be sampled at the entry points to the distribution system after any application of treatment. The minimum number of samples is one year of quarterly samples per water source.
NR 809.25(1)(c) (c) Groundwater systems shall be sampled at points of entry to the distribution system representative of each well after any application of treatment. The minimum number of samples is one sample per entry point to the distribution system.
NR 809.25(1)(d) (d) The department may require confirmation and follow-up samples for positive or negative results.
NR 809.25(1)(e) (e) List of unregulated volatile organic compounds:
Chloroform
Bromoform
Chlorodibromomethane
Bromodichloromethane
Bromobenzene
Bromomethane
Chloromethane
Chloroethane
o-Chlorotoluene
p-Chlorotoluene
Dibromomethane
m-Dichlorobenzene
1,1-Dichloropropene
1,1-Dichloroethane
1,3-Dichloropropane
2,2-Dichloropropane
1,3-Dichloropropene
1,1,1,2-Tetrachloroethane
1,1,2,2-Tetrachloroethane
1,2,3-Trichloropropane
1,2,4-Trimethylbenzene
1,2,3-Trichlorobenzene
n-Propylbenzene
n-Butylbenzene
Naphthalene
Hexachlorobutadiene
1,3,5-Trimethylbenzene
p-Isopropyltoluene
Isopropylbenzene
Tert-butylbenzene
Sec-butylbenzene
Fluorotrichloromethane
Dichlorodifluoromethane
Bromochloromethane
Methyl-t-butyl ether (MTBE)
NR 809.25(1)(f) (f) List of unregulated synthetic organic contaminants:
Aldrin
Aldicarb
Aldicarb Sulfoxide
Aldicarb Sulfone
Butachlor
Carbaryl
Dicamba
Dieldrin
3-Hydroxycarbofuran
Methomyl
Metolachlor
Metribuzin
Propachlor
NR 809.25(1)(g) (g) Analysis under this section shall be conducted by a laboratory certified under ch. NR 149 using EPA methods 502.2, 524.2, 524.3, 551.1 for contaminants listed in par. (e) and EPA methods listed in s. NR 809.203, Table CM for contaminants listed in par. (f).
NR 809.25(2) (2)Sulfate monitoring. Monitoring for sulfate shall be conducted as required by the department.
NR 809.25(3) (3)Reporting requirements. Reporting requirements under this section shall be as required under s. NR 809.80.
NR 809.25(4) (4)Treatment techniques for acrylamide and epichlorohydrin. In lieu of MCLs and monitoring for acrylamide and epichlorohydrin, the following treatment techniques and reporting are required. Each water supplier for public water system shall certify annually in writing to the department using third party or manufacturer's certification, that when acrylamide and epichlorohydrin are used in the treatment of drinking water, the combination, or product, of dose and monomer level does not exceed the levels specified as follows:
NR 809.25(4)(a) (a) Acrylamide = 0.05% dosed at 1 ppm or equivalent.
NR 809.25(4)(b) (b) Epichlorohydrin = 0.01% dosed at 20 ppm or equivalent.
NR 809.25(4)(c) (c) A water supplier may rely on certification from manufacturers or third parties, as approved by the department.
NR 809.25 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 15-049: am. (1) (g) Register March 2016 No. 723, eff. 4-1-16.
NR 809.30 NR 809.30 Distribution system microbiological contaminant maximum contaminant levels. The following are the maximum contaminant levels for coliform bacteria applicable to public water systems.
NR 809.30(1) (1)MCL for escherichia coli (E. Coli ).
NR 809.30(1)(a)(a) The MCL for E. coli is exceeded if any of the following occurs:
NR 809.30(1)(a)1. 1. The public water system has an E. coli-positive repeat sample following a total coliform-positive routine sample.
NR 809.30(1)(a)2. 2. The public water system has a total coliform-positive repeat sample following an E. coli-positive routine sample.
NR 809.30(1)(a)3. 3. The public water system fails to take all required repeat samples following an E. coli-positive routine sample.
NR 809.30(1)(a)4. 4. The public water system fails to test for E. coli when any repeat sample tests positive for total coliform.
NR 809.30(1)(b) (b) For purposes of public notification requirements in subch. VI, this is a violation that may pose an acute risk to health.
NR 809.30(2) (2)Determining compliance. The water supplier for a public water system shall determine compliance with the MCL for E. coli in sub. (1) for each monitoring period in which the public water system is required to monitor for total coliforms.
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.