Contaminant Name | Contaminant Number | Units | SDRL |
1,1 Dichloroethane | 0058 | µg/L | 0.5 |
1,1 Dichloroethylene | 0046 | µg/L | 0.5 |
1,1 Dichloropropene | 0062 | µg/L | 0.5 |
1,1,1 Trichloroethane | 0047 | µg/L | 0.5 |
1,1,1,2 Tetrachloroethane | 0072 | µg/L | 0.5 |
1,1,2 Trichloroethane | 0067 | µg/L | 0.5 |
1,1,2,2 Tetrachloroethane | 0080 | µg/L | 0.5 |
1,2 Dichlorobenzene | 0084 | µg/L | 0.5 |
1,2 Dichloroethane | 0050 | µg/L | 0.5 |
1,2 Dichloropropane | 0063 | µg/L | 0.5 |
1,2,3 Trichlorobenzene | 0098 | µg/L | 0.5 |
1,2,3 Trichloropropane | 0079 | µg/L | 0.5 |
1,2,4 Trichlorobenzene | 0095 | µg/L | 0.5 |
1,2,4 Trimethylbenzene | 0091 | µg/L | 0.5 |
1,3 Dichloropropane | 0070 | µg/L | 0.5 |
1,3 Dichloropropene | 0154 | µg/L | 0.5 |
1,3,5 Trimethylbenzene | 0089 | µg/L | 0.5 |
1,4 Dichlorobenzene | 0052 | µg/L | 0.5 |
2,2 Dichloropropane | 0059 | µg/L | 0.5 |
2,3,7,8 TCDD (dioxin) | 0149 | ng/L | 0.005 |
2,4 D | 0037 | µg/L | 0.1 |
2,4 DB | 0135 | µg/L | 1 |
2,4,5 T | 0136 | µg/L | 0.4 |
2,4,5 TP (Silvex) | 0038 | µg/L | 0.2 |
3,5 Dichlorbenzoic Acid | 0226 | µg/L | 0.5 |
4,4 DDD | 0232 | µg/L | 0.1 |
4,4 DDE | 0233 | µg/L | 0.1 |
4,4 DDT | 0234 | µg/L | 0.1 |
Acenaphthylene | 0244 | µg/L | 0.2 |
Acifluorfen | 0223 | µg/L | 2 |
Alachlor | 0117 | µg/L | 0.2 |
Aldicarb | 0142 | µg/L | 0.5 |
Aldicarb Sulfone | 0143 | µg/L | 0.8 |
Aldicarb Sulfoxide | 0144 | µg/L | 0.5 |
Aldrin | 0118 | µg/L | 0.1 |
Anthracene | 0246 | µg/L | 0.2 |
Arochlor 1016 | 0180 | µg/L | 0.08 |
Arochlor 1221 | 0173 | µg/L | 20 |
Arochlor 1232 | 0174 | µg/L | 0.5 |
Arochlor 1242 | 0175 | µg/L | 0.3 |
Arochlor 1248 | 0176 | µg/L | 0.1 |
Arochlor 1254 | 0177 | µg/L | 0.1 |
Arochlor 1260 | 0178 | µg/L | 0.2 |
Atrazine | 0119 | µg/L | 0.1 |
Bentazon | 0220 | µg/L | 0.5 |
Benzene | 0049 | µg/L | 0.5 |
Benzo (a) anthracene | 0247 | µg/L | 0.2 |
Benzo (a) Pyrene | 0120 | µg/L | 0.02 |
Benzo (b) fluoroanthene | 0248 | µg/L | 0.2 |
Benzo (k) fluoranthene | 0250 | µg/L | 0.2 |
Benzyl Butyl Phthalate | 0258 | µg/L | 1.0 |
Bromacil | 0179 | µg/L | 0.1 |
Bromobenzene | 0078 | µg/L | 0.5 |
Bromochloromethane | 0086 | µg/L | 0.5 |
Bromodichloromethane | 0028 | µg/L | 0.5 |
Bromoform | 0030 | µg/L | 0.5 |
Bromomethane | 0054 | µg/L | 0.5 |
Butachlor | 0121 | µg/L | 0.1 |
Carbaryl | 0145 | µg/L | 2 |
Carbofuran | 0146 | µg/L | 0.9 |
Carbon Tetrachloride | 0048 | µg/L | 0.5 |
Chlordane (total) | 0122 | µg/L | 0.2 |
Chlorobenzene | 0071 | µg/L | 0.5 |
Chloroethane | 0055 | µg/L | 0.5 |
Chloroform | 0027 | µg/L | 0.5 |
Chloromethane | 0053 | µg/L | 0.5 |
Chrysene | 0251 | µg/L | 0.2 |
Cis- 1,2 Dichloroethylene | 0060 | µg/L | 0.5 |
Cis- 1,3 Dichloropropene | 0065 | µg/L | 0.5 |
Dalapon | 0137 | µg/L | 1 |
DBCP | 0103 | µg/L | 0.02 |
DBCP (screening) | 0428 | µg/L | 0.5 |
DCPA Acid Metabolites | 0225 | µg/L | 0.1 |
Di (2-Ethylhexyl) Adipate | 0124 | µg/L | 0.6 |
Di (2-Ethylhexyl) Phthalate | 0125 | µg/L | 0.6 |
Dibromoacetic Acid | 0415 | µg/L | 1 |
Dibromochloromethane | 0029 | µg/L | 0.5 |
Dibromomethane | 0064 | µg/L | 0.5 |
Dicamba | 0138 | µg/L | 0.2 |
Dichloroacetic Acid | 0412 | µg/L | 1 |
Dichlorodifluoromethane | 0104 | µg/L | 0.5 |
Dichlorprop | 0221 | µg/L | 0.5 |
Dieldrin | 0123 | µg/L | 0.1 |
Diethyl Phthalate | 0260 | µg/L | 1.0 |
Dimethyl Phthalate | 0261 | µg/L | 1.0 |
Di-n-butyl Phthalate | 0259 | µg/L | 1.0 |
Dinoseb | 0139 | µg/L | 0.2 |
Diquat | 0150 | µg/L | 0.4 |
EDB | 0102 | µg/L | 0.01 |
EDB (screening) | 0427 | µg/L | 0.5 |
Endothal | 0151 | µg/L | 9 |
Endrin | 0033 | µg/L | 0.01 |
EPTC | 0208 | µg/L | 0.1 |
Ethylbenzene | 0073 | µg/L | 0.5 |
Fluorene | 0254 | µg/L | 0.2 |
Glyphosate | 0152 | µg/L | 6 |
HAA(5) | 0416 | µg/L | + |
Heptachlor | 0126 | µg/L | 0.04 |
Heptachlor Epoxide | 0127 | µg/L | 0.02 |
Hexachlorobenzene | 0128 | µg/L | 0.1 |
Hexachlorobutadiene | 0097 | µg/L | 0.5 |
Hexachlorocyclo pentadiene | 0129 | µg/L | 0.1 |
Isopropylbenzene | 0087 | µg/L | 0.5 |
Lindane (bhc - gamma) | 0034 | µg/L | 0.02 |
M- dichlorobenzene | 0083 | µg/L | 0.5 |
M/P Xylenes (MCL for total) | 0074 | µg/L | 0.5 |
Methomyl | 0147 | µg/L | 4 |
Methoxychlor | 0035 | µg/L | 0.1 |
Methylene Chloride (Dichloromethane) | 0056 | µg/L | 0.5 |
Metolachlor | 0130 | µg/L | 0.1 |
Metribuzin | 0131 | µg/L | 0.1 |
Molinate | 0218 | µg/L | 0.1 |
Monobromoacetic Acid | 0414 | µg/L | 1 |
Monochloroacetic Acid | 0411 | µg/L | 2 |
Naphthalene | 0096 | µg/L | 0.5 |
N-Butylbenzene | 0094 | µg/L | 0.5 |
N-Propylbenzene | 0088 | µg/L | 0.5 |
O- Chlorotoluene | 0081 | µg/L | 0.5 |
O- Xylene (MCL for total) | 0075 | µg/L | 0.5 |
Oxamyl | 0148 | µg/L | 2 |
P- Chlorotoluene | 0082 | µg/L | 0.5 |
Paraquat | 0400 | µg/L | 0.8 |
PCB (as Decachlorobiphenyl) | 0401 | µg/L | 0.1 |
Pentachlorophenol | 0134 | µg/L | 0.04 |
Phenanthrene | 0256 | µg/L | 0.2 |
Picloram | 0140 | µg/L | 0.1 |
P-Isopropyltoluene | 0093 | µg/L | 0.5 |
Propachlor | 0132 | µg/L | 0.1 |
Pyrene | 0257 | µg/L | 0.2 |
Sec- Butylbenzene | 0092 | µg/L | 0.5 |
Simazine | 0133 | µg/L | 0.07 |
Styrene | 0076 | µg/L | 0.5 |
Terbacil | 0190 | µg/L | 0.1 |
Tert- Butylbenzene | 0090 | µg/L | 0.5 |
Tetrachloroethylene | 0068 | µg/L | 0.5 |
Toluene | 0066 | µg/L | 0.5 |
Total organic carbon | 0421 | mg/L | 0.7 |
Total Trihalomethane | 0031 | µg/L | + |
Total Xylenes | 0160 | µg/L | 0.5 |
Toxaphene | 0036 | µg/L | 1 |
Trans- 1,2 Dichloroethylene | 0057 | µg/L | 0.5 |
Trans- 1,3 Dichloropropene | 0069 | µg/L | 0.5 |
Trichloroacetic Acid | 0413 | µg/L | 1 |
Trichloroethylene | 0051 | µg/L | 0.5 |
Trichlorofluoromethane | 0085 | µg/L | 0.5 |
Trifluralin | 0243 | µg/L | 0.1 |
Vinyl Chloride | 0045 | µg/L | 0.5 |
+ Results are calculated values based on other analytical results. |
(14) The SDRLs for inorganic chemical contaminants are established in Table 4 of this section. All contaminants in Table 4 are considered chronic contaminants except annual, quarterly, or monthly nitrate analysis which is considered an acute contaminant. Labs shall report analytical results within 10 business days after receiving the nitrate sample. If nitrate analysis is part of a routine complete inorganic compound panel, then labs shall submit a report to the department within 30 calendar days after receiving the sample.
(a) A lab shall report inorganic chemical contaminant results when the lab's established MRL is greater than the SDRL as:
(i) "Nondetect" or "ND" when a lab's result is less than the SDRL and MRL;
(ii) An estimated concentration, notated with a "J" data qualifier, when a result is equal to or greater than the SDRL, but less than the lab's established MRL; or
(iii) A number when a result is equal to or greater than the lab's established MRL.
(b) A lab shall report inorganic chemical contaminant results when the lab's established MRL is less than the SDRL as:
(i) "Nondetect" or "ND" when a lab's result is less than the lab's established MRL;
(ii) "Nondetect" or "ND" when a lab's result is less than the department's established SDRL, but greater than the lab's established MRL; or
(iii) A number when a result is equal to or greater than the SDRL.
(c) A lab shall report inorganic chemical contaminant results when the lab's established MRL is equal to the SDRL as:
(i) "Nondetect" or "ND" when a lab's result is less than the SDRL and MRL; or
(ii) A number when a result is equal to or greater than the SDRL and the lab's established MRL.
Table 4 - Inorganic Contaminants
Contaminant Name | Contaminant Number | Units | SDRL |
Alkalinity-Lab | 0403 | mg/L | 5 |
Antimony | 0112 | mg/L | 0.003 |
Arsenic | 0004 | mg/L | 0.001 |
Asbestos | 0115 | MFL | 0.20 |
Barium | 0005 | mg/L | 0.1 |
Beryllium | 0110 | mg/L | 0.0003 |
Bromate | 0419 | mg/L | 0.005/0.001 |
Cadmium | 0006 | mg/L | 0.001 |
Chloride | 0021 | mg/L | 2 |
Chlorite | 0418 | mg/L | 0.02 |
Chromium | 0007 | mg/L | 0.007 |
Color | 0018 | CU | 15 |
Conductivity | 0016 | µmhos/cm | 70 |
Copper | 0023 | mg/L | 0.02 |
Cyanide | 0116 | mg/L | 0.05 |
Fluoride | 0019 | mg/L | 0.2 |
Hardness | 0015 | mg/L | 10 |
Iron | 0008 | mg/L | 0.1 |
Lead | 0009 | mg/L | 0.001 |
Manganese | 0010 | mg/L | 0.01 |
Mercury | 0011 | mg/L | 0.0002 |
Nickel | 0111 | mg/L | 0.005 |
Nitrate-n | 0020 | mg/L | 0.5 |
Nitrite-n | 0114 | mg/L | 0.1 |
Selenium | 0012 | mg/L | 0.002 |
Silver | 0013 | mg/L | 0.1 |
Sodium | 0014 | mg/L | 5 |
Sulfate | 0022 | mg/L | 2 |
TDS-total dissolved solids | 0026 | mg/L | 100 |
Thallium | 0113 | mg/L | 0.001 |
Total nitrate/nitrite | 0161 | mg/L | 0.5 |
Turbidity | 0017 | NTU | 0.1 |
Zinc | 0024 | mg/L | 0.2 |
Labs that use EPA Methods 317.0, 326.0 or 321.8 must meet a 0.0010 mg/L SDRL for bromate. |
(15) The SDRLs for radiochemistry contaminants are established in Table 5 of this section. All contaminants in Table 5 are considered chronic contaminants.
(a) A lab's MDA must meet the established SDRL levels for the analysis to be considered for compliance purposes.
(b) A lab shall report radiochemistry contaminant results as:
(i) A number and a "U" qualifier if the contaminant was analyzed for, but not detected at or above the lab's established MDA; or
(ii) A number when a result is equal to or greater than the lab's established MDA.
Table 5 - Radiochemistry Contaminants
Contaminant Name | Contaminant Number | Units | SDRL |
Cesium 134 | 0107 | pCi/L | 10.0 |
Gross Alpha | 0165 | pCi/L | 3.0 |
Gross Alpha (Minus Uranium) | 0041 | pCi/L | + |
Gross Beta | 0042 | pCi/L | 4.0 |
Iodine 131 | 0108 | pCi/L | 1.0 |
Radium 226 | 0039 | pCi/L | 1.0 |
Radium 226 + 228 | 0040 | pCi/L | + |
Radium 228 | 0166 | pCi/L | 1.0 |
Radon | 0109 | pCi/L | + |
Strontium 90 | 0044 | pCi/L | 2.0 |
Tritium | 0043 | pCi/L | 1000 |
Uranium | 0105 | µg/L | 1.0 |
+ Results are calculated values based on other analytical results. |
(16) The units for microbiology contaminants are established in Table 6 of this section. All contaminants in Table 6 are considered acute contaminants.
(a) Total coliform and E. coli results for routine and repeat samples in accordance with 40 C.F.R. 141 Subpart Y - Revised Total Coliform Rule, GWR triggered, and GWR assessment source sample results that are absent or present as follows:
(i) "Satisfactory" if no total coliforms are detected.
(ii) "Unsatisfactory" if:
(A) Total coliforms are detected; and
(B) E. coli absent if E. coli is not detected; or
(C) E. coli present if E. coli is detected.
(b) A lab shall report routine filtered and unfiltered surface water microbiology contaminant results as a number.
(c) A lab shall report routine heterotrophic plate count results as a number.
(d) A lab shall report results of investigative samples or samples collected for information only to the public water system for total coliforms, fecal coliforms, and E. coli as a number or, as absent or present. Investigative samples or samples collected for information only are not required to be reported to the department.
Table 6 - Microbiology Contaminants
Contaminant Name | Contaminant Number | Units |
E. coli (numerical) | 0003 | CFU/100mL |
E. coli (numerical) | 0003 | MPN/100mL |
E. coli (absence/presence) | 0003 | N/A |
Fecal Coliform (numerical) | 0002 | CFU/100mL |
Fecal Coliform (numerical) | 0002 | MPN/100mL |
Fecal Coliform (absence/presence) | 0002 | N/A |
Heterotrophic Plate Count (numerical) | 0101 | CFU/1mL |
Heterotrophic Plate Count (numerical) | 0101 | MPN/mL |
Total Coliform (numerical) | 0001 | CFU/100mL |
Total Coliform (numerical) | 0001 | MPN/100mL |
Total Coliform (absence/presence) | 0001 | N/A |
(17) The SDRLs for per- and polyfluoroalkyl substances (PFAS) are established in Table 7 of this section. All contaminants in Table 7 are considered chronic contaminants.
(a) A lab shall analyze PFAS samples using EPA method 537.1, or EPA method 533, or with written approval, other department-approved methods.
(b) A lab shall report PFAS contaminant results when the lab's established MRL is greater than the SDRL as follows:
(i) "Nondetect" or "ND" when a lab's result is less than the SDRL and MRL;
(ii) An estimated concentration, notated with a "J" data qualifier when a result is equal to or greater than the SDRL, but less than the lab's established MRL; or
(iii) A number when a result is equal to or greater than the lab's established MRL.
(c) A lab shall report PFAS contaminant results when the lab's established MRL is less than the SDRL as follows:
(i) "Nondetect" or "ND" when a lab's result is less than the lab's established MRL;
(ii) "Nondetect" or "ND" when a lab's result is less than the established SDRL; or
(iii) A number when a result is equal to or greater than the SDRL.
(d) A lab shall report PFAS contaminant results when the lab's established MRL is equal to the SDRL as follows:
(i) "Nondetect" or "ND" when a lab's result is less than the SDRL and MRL; or
(ii) A number when a result is equal to or greater than the SDRL and the lab's established MRL.
(e) A lab shall report to the department any tentatively identified compounds (TIC) that are detected while analyzing a PFAS sample if the approved method allows for TIC determinations to be made.
(f) A lab shall attach to the analytical result a copy of the method-specific QC results for any TIC detections that are reported to the department.
Table 7 - Per- and Polyfluoroalkyl Contaminants
Contaminant Name | Contaminant Number | Units | SDRL | 3Required Contaminant List for EPA 537.1 | 4Required Contaminant List for EPA 533 |
(11Cl-PF3OUdS) 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid | 448 | ng/L | 2 | Y | Y |
(4:2FTS) 1H,1H, 2H, 2H-Perfluorohexane sulfonic acid | 450 | ng/L | 2 | N | Y |
(6:2FTS) 1H,1H, 2H, 2H-Perfluorooctane sulfonic acid | 451 | ng/L | 2 | N | Y |
(8:2FTS) 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid | 452 | ng/L | 2 | N | Y |
(9Cl-PF3ONS) 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid | 446 | ng/L | 2 | Y | Y |
(ADONA) 4,8-Dioxa-3H-perfluorononanoic acid | 445 | ng/L | 2 | Y | Y |
(HFPO-DA) Hexafluoropropylene oxide dimer acid | 447 | ng/L | 2 | Y | Y |
(NEtFOSAA) N-ethyl perfluorooctanesulfonamidoacetic acid | 441 | ng/L | 3 | Y | N |
(NFDHA) Nonafluoro-3,6-dioxaheptanoic acid | 453 | ng/L | 2 | N | Y |
(NMeFOSAA) N-methyl perfluorooctanesulfonamidoacetic acid | 442 | ng/L | 3 | Y | N |
(PFBA) Perfluorobutanoic acid | 454 | ng/L | 2 | N | Y |
(PFBS) Perfluorobutanesulfonic acid | 429 | ng/L | 2 | Y | Y |
(PFDA) Perfluorodecanoic acid | 436 | ng/L | 2 | Y | Y |
(PFDoA) Perfluorododecanoic acid | 438 | ng/L | 2 | Y | Y |
(PFEESA) Perfluoro(2-ethoxyethane)sulfonic acid | 460 | ng/L | 2 | N | Y |
(PFHpA) Perfluoroheptanoic acid | 430 | ng/L | 2 | Y | Y |
(PFHpS) Perfluoroheptanesulfonic acid | 455 | ng/L | 2 | N | Y |
(PFHxA) Perfluorohexanoic acid | 435 | ng/L | 2 | Y | Y |
(PFHxS) Perfluorohexanesulfonic acid | 431 | ng/L | 2 | Y | Y |
(PFMBA) Perfluoro-4-methoxybutanoic acid | 456 | ng/L | 2 | N | Y |
(PFMPA) Perfluoro-3-methoxypropanoic acid | 457 | ng/L | 2 | N | Y |
(PFNA) Perfluorononanoic acid | 432 | ng/L | 2 | Y | Y |
(PFOA) Perfluorooctanoic acid | 434 | ng/L | 2 | Y | Y |
(PFOS) Perfluorooctanesulfonic acid | 433 | ng/L | 2 | Y | Y |
(PFPeA) Perfluoropentanoic acid | 458 | ng/L | 2 | N | Y |
(PFPeS) Perfluoropentanesulfonic acid | 459 | ng/L | 2 | N | Y |
(PFTA) Perfluorotetradecanoic acid | 440 | ng/L | 2 | Y | N |
(PFTrDA) Perfluorotridecanoic acid | 439 | ng/L | 2 | Y | N |
(PFUnA) Perfluoroundecanoic acid | 437 | ng/L | 2 | Y | Y |
3 | For a water system to qualify for a monitoring waiver these contaminants must be reported to the department if analyzing the sample using EPA method 537.1. |
4 | For a water system to qualify for a monitoring waiver these contaminants must be reported to the department if analyzing the sample using EPA method 533. |
[Statutory Authority: RCW
43.20.050 and
70A.125.080. WSR 21-23-096, § 246-390-075, filed 11/17/21, effective 1/1/22. Statutory Authority: RCW
43.20.050 and
70.119A.080. WSR 18-09-048, § 246-390-075, filed 4/13/18, effective 5/14/18.]